Types of Conjunctions for the ATI TEAS Version 7 (English & Language Usage) — Including Definitions, Uses, Examples, and Practice Questions with Answers and Explanations

Overview: 3 Main Types of Conjunctions

Type	Function	Common Examples
Coordinating	Join equal/independent elements	for, and, nor, but, or, yet, so (FANBOYS)
Subordinating	Join dependent clause to independent clause	because, although, since, when, while, if, unless, etc.
Correlative	Pairs of conjunctions working together	both/and, either/or, neither/nor, not only/but also, whether/or

Part 1: Coordinating Conjunctions (FANBOYS)

Rules

Join two independent clauses (complete sentences) or equal grammatical elements (nouns, verbs, adjectives).
Use a comma before the conjunction when joining two full sentences.
No comma needed for short or equal elements.

FANBOYS Chart

Conjunction	Meaning/Use	Example
F = for	reason/cause (similar to because)	He studied hard, for he wanted to pass the TEAS.
A = and	addition	She took the test, and she passed easily.
N = nor	negative addition	He didn't study, nor did he sleep well.
B = but	contrast	The question was hard, but I answered correctly.
O = or	choice/alternative	You can review grammar, or you can practice math.
Y = yet	contrast (stronger than but)	She was tired, yet she continued studying.
S = so	result/consequence	I forgot my notes, so I had to rely on memory.

TEAS-Specific Examples

✅ The nurse checked the vitals, and the doctor reviewed the chart.

✅ The patient did not eat breakfast, nor did he drink water.

✅ The medication is effective, but it has side effects.

✅ You can take the exam in the morning, or you can take it in the afternoon.

✅ The lab results were inconclusive, so the test was repeated.

Common Errors

Incorrect	Why Wrong	Correct
She was late, so she missed the bus.	No error (correct)	—
He is smart but he is lazy.	Missing comma before but with two full clauses	He is smart, but he is lazy.
I studied hard, for the exam was difficult.	Acceptable but formal	I studied hard because the exam was difficult.

Part 2: Subordinating Conjunctions

Rules

Join a dependent clause (incomplete thought) to an independent clause (complete sentence).
If the dependent clause comes first, use a comma after it.
If the independent clause comes first, no comma is needed.

Common Subordinating Conjunctions by Function

Function	Conjunctions	Example
Cause/Reason	because, since, as	She passed because she studied daily.
Time	when, while, after, before, until, as soon as, since	He rested after the surgery.
Contrast/Concession	although, though, even though, whereas, while	Although she was nervous, she did well.
Condition	if, unless, provided that, as long as, in case	You will succeed if you prepare.
Purpose	so that, in order that	She reviewed notes so that she would remember.
Place	where, wherever	He placed the stethoscope where the nurse indicated.

TEAS-Specific Examples

Cause/Reason:

✅ The patient was admitted because his fever was high.

✅ Since the lab was closed, we rescheduled the test.

Time:

✅ When the results arrived, the doctor reviewed them immediately.

✅ She waited until the medication took effect.

Contrast:

✅ Although the procedure was painful, the patient remained calm.

✅ Even though he studied, he found the exam challenging.

Condition:

✅ Unless you complete the prerequisite, you cannot take the course.

✅ If the symptoms persist, contact your physician.

Purpose:

✅ The nurse spoke clearly so that the patient would understand.

Comma Rules with Subordinating Conjunctions

Structure	Comma?	Example
Dependent clause + Independent clause	✅ Yes	Because she was tired, she went to bed early.
Independent clause + Dependent clause	❌ No	She went to bed early because she was tired.

Part 3: Correlative Conjunctions

Rules

Work in pairs to join equal grammatical structures.
Maintain parallel structure (same grammatical form after each part).

Common Correlative Conjunctions

Pair	Meaning	Example
both / and	inclusion of two items	She is both a nurse and a researcher.
either / or	choice between two	You can take either the morning or the afternoon slot.
neither / nor	negation of both	He is neither a doctor nor a specialist.
not only / but also	emphasis on addition	She not only passed but also scored in the top percentile.
whether / or	expressing alternatives	He wasn't sure whether to wait or to leave.
as / as (comparison)	equality	The second test was as difficult as the first.
such / that	result	It was such a hard question that many got it wrong.

TEAS-Specific Examples

✅ Both the heart rate and the blood pressure were elevated.

✅ You can either apply the ointment or take the oral medication.

✅ The patient had neither eaten nor drunk anything for eight hours.

✅ She not only completed the exam early but also reviewed her answers.

✅ The nurse asked whether the pain was sharp or dull.

Parallel Structure Requirement

Incorrect (Not Parallel)	Correct (Parallel)
She is both a nurse and works as a researcher.	She is both a nurse and a researcher.
He not only passed but also scored high. (fine)	He not only passed but also scored high. (fine)
Either you study or sleeping.	Either you study or you sleep.

Part 4: TEAS-Specific Comparison Table

Conjunction Type	Joins	Punctuation Rule	TEAS Frequency
Coordinating	Two independent clauses	Comma before FANBOYS (if both are full sentences)	High
Subordinating	Dependent + Independent	Comma if dependent clause comes first	Very High
Correlative	Two equal grammatical structures	No comma needed between pairs	Medium

Practice Questions (50 Total)

Set 1: Identify the conjunction type (Coordinating / Subordinating / Correlative)

1. She wanted to become a nurse, so she applied to nursing school.

✅ Coordinating (so — FANBOYS)

2. He passed the exam because he studied every night.

✅ Subordinating (because — cause/reason)

3. Both the instructor and the students agreed on the answer.

✅ Correlative (both/and)

4. You will not pass unless you complete the practice questions.

✅ Subordinating (unless — condition)

5. The medication is effective, but it causes drowsiness.

✅ Coordinating (but — contrast)

6. Neither the nurse nor the doctor was available.

✅ Correlative (neither/nor)

7. The patient rested after the surgery was complete.

✅ Subordinating (after — time)

8. Study the material, or you will struggle on the exam.

✅ Coordinating (or — choice)

9. Not only did she finish early, but also she scored perfectly.

✅ Correlative (not only/but also)

10. Although the question was tricky, many students got it right.

✅ Subordinating (although — contrast)

Set 2: Choose the Correct Conjunction

11. She was tired, _______ she continued studying for the TEAS.

a) so
b) but
c) for
d) because

✅ b) but — Contrast (tired vs. continued studying)

12. _______ you read the instructions carefully, you may make errors.

a) Unless
b) If
c) Because
d) So that

✅ a) Unless — Condition meaning "if not"

13. The nurse checked the bandage _______ the patient slept.

a) so
b) but
c) while
d) or

✅ c) while — Subordinating conjunction for simultaneous time

14. He is _ a skilled technician _ a compassionate caregiver.

a) either / or
b) neither / nor
c) both / and
d) whether / or

✅ c) both / and — Inclusion of two positive traits

15. The lab results were delayed, _______ the doctor made a decision based on symptoms.

a) so
b) yet
c) for
d) nor

✅ b) yet — Contrast (delayed results vs. still decided)

16. _______ the patient had a fever, the nurse administered medication.

a) Because
b) Unless
c) Whereas
d) Before

✅ a) Because — Cause/reason

17. You can _ take the exam online _ at a testing center.

a) both / and
b) neither / nor
c) either / or
d) not only / but also

✅ c) either / or — Choice between two options

18. She reviewed her notes every day _______ she would remember the material.

a) so that
b) because
c) although
d) unless

✅ a) so that — Purpose

19. The patient did not eat breakfast, _______ did he take his morning medication.

a) or
b) nor
c) so
d) yet

✅ b) nor — Coordinating conjunction for negative addition (requires inversion after nor)

20. _______ the procedure was uncomfortable, the patient remained calm.

a) Even though
b) Because
c) Since
d) So that

✅ a) Even though — Contrast/concession

100 Practice Questions for the ATI TEAS Version 7 (English & Language Usage) covering Past Tense, After/Before, When/While, and Conjunctions — with options and answers with reasons at the end.

Questions 1–20: Simple Past & Irregular Verbs

1. Yesterday, the nurse _______ the patient’s blood pressure.
a) take
b) taked
c) took
d) taken

2. The students _______ all the practice questions before the exam.
a) complete
b) completed
c) completes
d) completing

3. She _______ to the pharmacy after work.
a) go
b) went
c) gone
d) goes

4. The doctor _______ the results carefully.
a) review
b) reviewed
c) reviewing
d) reviews

5. He _______ his keys somewhere in the hospital.
a) lose
b) losed
c) lost
d) losing

6. The committee _______ the proposal unanimously.
a) reject
b) rejected
c) rejectted
d) rejecting

7. They _______ a new protocol for hand hygiene.
a) implement
b) implemented
c) implementing
d) implements

8. The patient _______ conscious throughout the procedure.
a) remain
b) remained
c) remaining
d) remains

9. I _______ the error immediately after it happened.
a) see
b) seed
c) saw
d) seen

10. The pharmacist _______ the prescription in minutes.
a) fill
b) filled
c) filling
d) fills

11. She _______ the heavy box without any help.
a) lift
b) lifted
c) lifting
d) lifts

12. The water _______ from the broken pipe all night.
a) flow
b) flowed
c) flown
d) flowing

13. He _______ us the truth about the incident.
a) tell
b) told
c) telling
d) tells

14. The researchers _______ the data for three months.
a) collect
b) collected
c) collecting
d) collects

15. The storm _______ several trees in the neighborhood.
a) uproot
b) uprooted
c) uprooting
d) uproots

16. We _______ a wonderful time at the conference.
a) have
b) had
c) having
d) has

17. The teacher _______ the concept twice for the class.
a) explain
b) explained
c) explaining
d) explains

18. He _______ his finger while chopping vegetables.
a) cut
b) cutted
c) cutting
d) cuts

19. The team _______ the project ahead of schedule.
a) finish
b) finished
c) finishing
d) finishes

20. She _______ the letter and mailed it immediately.
a) write
b) wrote
c) written
d) writes

Questions 21–35: Past Continuous & Simple Past (When/While)

21. While I _______ to work, I _______ an accident.
a) drove / saw
b) was driving / saw
c) drove / was seeing
d) was driving / was seeing

22. She _______ dinner when the phone _______.
a) cooked / rang
b) was cooking / was ringing
c) was cooking / rang
d) cooked / was ringing

23. The patient _______ in the waiting room when the nurse _______ his name.
a) sat / called
b) was sitting / called
c) sat / was calling
d) was sitting / was calling

24. When the alarm _______, everyone _______ the building.
a) sounded / evacuated
b) was sounding / evacuated
c) sounded / was evacuating
d) was sounding / was evacuating

25. The students _______ notes while the professor _______.
a) took / lectured
b) were taking / was lecturing
c) took / was lecturing
d) were taking / lectured

26. He _______ his leg while he _______ soccer.
a) broke / played
b) was breaking / played
c) broke / was playing
d) was breaking / was playing

27. When the doctor _______ the room, the patient _______.
a) entered / slept
b) was entering / slept
c) entered / was sleeping
d) was entering / was sleeping

28. While the lab technician _______ the samples, the machine _______ down.
a) analyzed / broke
b) was analyzing / broke
c) analyzed / was breaking
d) was analyzing / was breaking

29. I _______ a strange noise when I _______ to the presentation.
a) heard / listened
b) was hearing / was listening
c) heard / was listening
d) was hearing / listened

30. The children _______ outside when it _______ to rain.
a) played / started
b) were playing / started
c) played / was starting
d) were playing / was starting

31. When the results _______, the patient _______.
a) arrived / waited
b) were arriving / waited
c) arrived / was waiting
d) were arriving / was waiting

32. While the surgeon _______ the operation, the lights _______ out.
a) performed / went
b) was performing / went
c) performed / was going
d) was performing / was going

33. She _______ asleep while she _______ TV.
a) fell / watched
b) was falling / was watching
c) fell / was watching
d) was falling / watched

34. When the fire alarm _______, we _______ a break.
a) rang / took
b) was ringing / took
c) rang / were taking
d) was ringing / were taking

35. The nurse _______ the patient’s hand while she _______ the procedure.
a) held / explained
b) was holding / explained
c) held / was explaining
d) was holding / was explaining

Questions 36–45: After / Before with Past Tense

36. After she _______ her shift, she _______ home.
a) finished / went
b) had finished / went
c) finishes / goes
d) both a and b

37. Before the teacher _______ the room, the students _______ silent.
a) entered / became
b) entered / had become
c) had entered / became
d) was entering / became

38. The patient reported pain _______ he _______ the medication.
a) after / took
b) before / had taken
c) after / had taken
d) before / was taking

39. After the lab _______ the results, the doctor _______ the patient.
a) confirmed / called
b) had confirmed / called
c) confirms / calls
d) both a and b

40. _______ the ambulance _______, the victim _______ consciousness.
a) Before / arrived / lost
b) After / arrived / had lost
c) Before / arrived / had lost
d) After / had arrived / lost

41. She _______ the letter after she _______ it three times.
a) mailed / checked
b) had mailed / checked
c) mailed / had checked
d) was mailing / checked

42. He realized he _______ his phone _______ he left the office.
a) forgot / after
b) had forgotten / before
c) forgot / before
d) had forgotten / after

43. After the storm _______ , the crew _______ the damage.
a) passed / assessed
b) had passed / assessed
c) passes / assesses
d) both a and b

44. Before the nurse _______ the injection, she _______ the patient’s ID.
a) gave / checked
b) had given / checked
c) gave / had checked
d) was giving / checked

45. The students _______ the test after they _______ for weeks.
a) took / studied
b) had taken / studied
c) took / had studied
d) were taking / studied

Questions 46–60: Coordinating Conjunctions (FANBOYS)

46. She wanted to become a nurse, _______ she applied to nursing school.
a) but
b) so
c) for
d) yet

47. The medication is effective, _______ it has side effects.
a) and
b) so
c) but
d) or

48. He didn't study for the exam, _______ did he get enough sleep.
a) or
b) nor
c) so
d) yet

49. You can take the morning slot, _______ you can take the afternoon slot.
a) nor
b) so
c) but
d) or

50. She was exhausted, _______ she continued to study.
a) so
b) for
c) yet
d) nor

51. The lab results were delayed, _______ the doctor made a decision based on symptoms.
a) yet
b) so
c) for
d) nor

52. He must be ill, _______ he did not come to work.
a) so
b) but
c) for
d) nor

53. The patient did not eat breakfast, _______ did he drink water.
a) or
b) nor
c) so
d) yet

54. Study the material, _______ you will struggle on the exam.
a) and
b) nor
c) but
d) or

55. She passed the exam easily, _______ she had studied diligently.
a) so
b) for
c) but
d) yet

56. The nurse checked the vitals, _______ the doctor reviewed the chart.
a) and
b) so
c) but
d) for

57. He is skilled, _______ he lacks experience.
a) so
b) for
c) but
d) nor

58. You must arrive on time, _______ you will not be admitted.
a) and
b) nor
c) but
d) or

59. She didn't see the sign, _______ did she hear the announcement.
a) or
b) nor
c) so
d) yet

60. The treatment was successful, _______ the patient recovered quickly.
a) so
b) for
c) but
d) yet

Questions 61–75: Subordinating Conjunctions

61. _______ she was nervous, she performed well on the exam.
a) Because
b) Although
c) Unless
d) So that

62. You will not pass _______ you complete the practice questions.
a) if
b) unless
c) because
d) so that

63. The nurse spoke gently _______ the child would not be frightened.
a) because
b) although
c) so that
d) unless

64. _______ the patient arrived, the nurse completed the intake form.
a) When
b) Unless
c) Although
d) Because

65. _______ you have a fever, you should stay home.
a) Unless
b) If
c) Whereas
d) Before

66. He rested _______ the surgery was complete.
a) after
b) before
c) until
d) while

67. _______ she is a skilled nurse, she continues to study advanced topics.
a) Although
b) Because
c) Unless
d) So that

68. The doctor explained the diagnosis _______ the patient could understand.
a) because
b) although
c) so that
d) unless

69. _______ the lab was closed, we rescheduled the test.
a) Since
b) Unless
c) Although
d) While

70. She waited _______ the medication took effect.
a) after
b) before
c) until
d) when

71. _______ the procedure was uncomfortable, the patient remained calm.
a) Because
b) Even though
c) So that
d) Unless

72. _______ you read the instructions, you may make errors.
a) If
b) Unless
c) Because
d) So that

73. The patient was admitted _______ his fever was high.
a) because
b) although
c) unless
d) so that

74. _______ the nurse was explaining the procedure, the patient listened carefully.
a) When
b) While
c) After
d) Before

75. _______ you practice daily, you will not improve.
a) If
b) Unless
c) Because
d) So that

Questions 76–85: Correlative Conjunctions

76. She is _______ a nurse _______ a researcher.
a) either / or
b) neither / nor
c) both / and
d) whether / or

77. _______ the instructor _______ the students agreed on the answer.
a) Either / or
b) Both / and
c) Neither / nor
d) Whether / or

78. He _______ passed the exam _______ scored in the top percentile.
a) either / or
b) neither / nor
c) both / and
d) not only / but also

79. You can _______ take the exam online _______ at a testing center.
a) both / and
b) neither / nor
c) either / or
d) not only / but also

80. _______ the nurse _______ the doctor was available.
a) Either / or
b) Both / and
c) Neither / nor
d) Whether / or

81. The second test was _______ difficult _______ the first.
a) as / as
b) both / and
c) either / or
d) not only / but also

82. She is _______ a licensed nurse _______ a certified phlebotomist.
a) either / or
b) both / and
c) whether / or
d) not only / but also

83. He wasn't sure _______ to wait _______ to leave.
a) both / and
b) either / or
c) neither / nor
d) whether / or

84. It was _______ a hard question _______ many got it wrong.
a) as / as
b) such / that
c) both / and
d) not only / but also

85. _______ you pass _______ fail, you should be proud of your effort.
a) Either / or
b) Whether / or
c) Both / and
d) Neither / nor

Questions 86–100: Mixed Conjunction & Tense Errors

86. Identify the error: She was late so she missed the first ten questions.
a) No error
b) Missing comma before "so"
c) Wrong conjunction
d) Wrong tense

87. Identify the error: Because she studied hard she passed easily.
a) No error
b) Missing comma after "hard"
c) Wrong conjunction
d) Wrong tense

88. Identify the error: Neither the nurse or the doctor was available.
a) "Neither" should be "Either"
b) "or" should be "nor"
c) "was" should be "were"
d) No error

89. Identify the error: He is both smart and he works hard.
a) "both" should be "either"
b) Missing comma
c) Lack of parallel structure
d) No error

90. Identify the error: While the phone rang, I answered it.
a) "While" should be "When"
b) "rang" should be "was ringing"
c) Both a and b
d) No error

91. Identify the error: She was reading a book when the baby was crying.
a) "when" should be "while"
b) "was reading" should be "read"
c) "was crying" should be "cried"
d) No error

92. Identify the error: After she ate dinner, she had left the house.
a) "ate" should be "had eaten"
b) "had left" should be "left"
c) "After" should be "Before"
d) No error

93. Identify the error: Before the concert had started, we found our seats.
a) "had started" should be "started"
b) "found" should be "had found"
c) Both a and b
d) No error

94. Identify the error: The patient wanted to go home, for the doctor advised staying.
a) "for" should be "but"
b) "wanted" should be "wants"
c) Missing comma
d) No error

95. Identify the error: Not only did she finish early but also she reviewed her answers.
a) Missing comma after "early"
b) Missing "did" after "but also"
c) Missing "she" after "but also" (actually correct)
d) No error (TEAS may accept or require "but she also") — standard: "not only...but also" without extra "she" is fine.

96. Choose the correct sentence:
a) When I was cooking, the phone was ringing.
b) While I cooked, the phone rang.
c) While I was cooking, the phone rang.
d) When I cooked, the phone was ringing.

97. Choose the correct sentence:
a) After she had finished her shift, she went home.
b) After she finished her shift, she had gone home.
c) After she finishes her shift, she went home.
d) After she was finishing her shift, she went home.

98. Choose the correct sentence:
a) Unless you study, you will not pass.
b) Unless you study, you will pass.
c) You will pass unless you study.
d) You will not pass if you study.

99. Choose the correct sentence:
a) The nurse checked the vitals, so the doctor reviewed the chart.
b) The nurse checked the vitals, and the doctor reviewed the chart.
c) The nurse checked the vitals, for the doctor reviewed the chart.
d) The nurse checked the vitals, yet the doctor reviewed the chart.

100. Choose the correct sentence:
a) The patient was resting when the nurse enters the room.
b) The patient rested when the nurse was entering the room.
c) The patient was resting when the nurse entered the room.
d) The patient rests when the nurse entered the room.

Answers with ReasonsAnswers with Reasons

1–20: Simple Past & Irregular Verbs

1. c) took – "Yesterday" requires simple past; "take" is irregular → took.

2. b) completed – Regular verb; add -ed for past.

3. b) went – Irregular verb "go" → went.

4. b) reviewed – Regular past.

5. c) lost – Irregular "lose" → lost.

6. b) rejected – Regular; "rejectted" is incorrect spelling.

7. b) implemented – Regular past.

8. b) remained – Regular past.

9. c) saw – Irregular "see" → saw. "Seen" needs auxiliary.

10. b) filled – Regular.

11. b) lifted – Regular.

12. b) flowed – Regular; "flown" is the past participle of "fly."

13. b) told – Irregular "tell" → told.

14. b) collected – Regular.

15. b) uprooted – Regular.

16. b) had – Irregular "have" → had.

17. b) explained – Regular.

18. a) cut – Irregular; past form = cut.

19. b) finished – Regular.

20. b) wrote – Irregular "write" → wrote.

21–35: Past Continuous & Simple Past (When/While)

21. b) was driving / saw – Long action (driving) interrupted by short action (saw).

22. c) was cooking / rang – Cooking in progress when phone rang.

23. b) was sitting / called – Waiting in progress when nurse called.

24. a) sounded / evacuated – Sequence: alarm sounded, then everyone evacuated.

25. b) were taking / was lecturing – Two simultaneous long actions.

26. c) broke / was playing – Broke leg during soccer game.

27. c) entered / was sleeping – Entered (short) while patient was sleeping.

28. b) was analyzing / broke – Analyzing in progress when machine broke.

29. c) heard / was listening – Heard noise while listening to presentation.

30. b) were playing / started – Playing outside when rain started.

31. c) arrived / was waiting – Results arrived while patient was waiting.

32. b) was performing / went – Performing surgery when lights went out.

33. c) fell / was watching – Fell asleep while watching TV.

34. c) rang / were taking – Alarm rang while we were taking a break.

35. c) held / was explaining – Held hand while explaining (simultaneous).

36–45: After / Before with Past Tense

36. d) both a and b – Simple past or past perfect both correct after "after."

37. b) entered / had become – Before + past perfect for earlier action.

38. c) after / had taken – Pain occurred after taking medication (past perfect for earlier action).

39. d) both a and b – Simple past or past perfect fine after "after."

40. c) Before / arrived / had lost – Lost consciousness before ambulance arrived.

41. c) mailed / had checked – Checking happened before mailing.

42. b) had forgotten / before – Forgot phone before leaving.

43. d) both a and b – After + simple past or past perfect.

44. c) gave / had checked – Checked ID before giving injection.

45. c) took / had studied – Studying happened before taking test.

46–60: Coordinating Conjunctions (FANBOYS)

46. b) so – Cause-effect: wanted to be nurse → applied.

47. c) but – Contrast: effective but has side effects.

48. b) nor – Negative addition: didn't study, nor did he sleep.

49. d) or – Choice: morning or afternoon.

50. c) yet – Contrast: exhausted yet continued.

51. a) yet – Contrast: delayed yet doctor decided.

52. c) for – Reason: ill, for he didn't come.

53. b) nor – Negative addition.

54. d) or – Warning: study or struggle.

55. b) for – Reason: passed easily, for she studied.

56. a) and – Addition: checked and reviewed.

57. c) but – Contrast: skilled but lacks experience.

58. d) or – Consequence: arrive on time or not admitted.

59. b) nor – Negative addition.

60. a) so – Result: successful so recovered.

61–75: Subordinating Conjunctions

61. b) Although – Contrast: nervous but performed well.

62. b) unless – Condition: not pass unless you complete.

63. c) so that – Purpose: spoke gently so child wouldn't fear.

64. a) When – Time: when patient arrived.

65. b) If – Condition: if you have fever.

66. a) after – Time: rested after surgery.

67. a) Although – Contrast: skilled yet continues studying.

68. c) so that – Purpose: explained so patient could understand.

69. a) Since – Reason: since lab closed.

70. c) until – Time: waited until medication took effect.

71. b) Even though – Contrast: uncomfortable but calm.

72. a) If – Condition: if you don't read instructions.

73. a) because – Reason: because fever high.

74. b) While – Simultaneous: while nurse explained.

75. b) Unless – Condition: unless you practice, no improvement.

76–85: Correlative Conjunctions

76. c) both / and – Both nurse and researcher.

77. c) Neither / nor – Neither instructor nor students agreed.

78. d) not only / but also – Not only passed but also scored top.

79. c) either / or – Either online or at center.

80. a) Either / or – Either nurse or doctor was available.

81. a) as / as – As difficult as the first.

82. b) both / and – Both nurse and phlebotomist.

83. d) whether / or – Whether to wait or leave.

84. b) such / that – Such a hard question that many got wrong.

85. b) Whether / or – Whether pass or fail.

86–100: Mixed Conjunction & Tense Errors

86. b) Missing comma before "so" – Comma needed before FANBOYS joining independent clauses.

87. b) Missing comma after "hard" – Because-clause needs comma if before main clause.

88. b) "or" should be "nor" – Neither...nor.

89. c) Lack of parallel structure – "Both smart and hardworking" not "both smart and he works hard."

90. d) No error – "While" can indicate a short action, but "when" is better; TEAS accepts no error.

91. c) "was crying" should be "cried" – When + simple past for short action interrupting.

92. b) "had left" should be "left" – After ate dinner, then left (no past perfect needed).

93. a) "had started" should be "started" – Before concert started (simple past), then found seats.

94. a) "for" should be "but" – Contrast (wanted to go home but doctor advised staying).

95. d) No error – "Not only...but also" correctly structured.

96. c) While I was cooking, the phone rang – Long action (cooking) interrupted by short (rang).

97. a) After she had finished her shift, she went home – Past perfect optional but correct.

98. a) Unless you study, you will not pass – Unless = if not.

99. b) The nurse checked the vitals, and the doctor reviewed the chart – Simple addition, not cause-effect.

100. c) The patient was resting when the nurse entered the room – Correct past continuous + simple past.