QUESTION 30- 34: GRAMMAR IN USE

Why A is correct:
The blank needs an adverb to describe *how* Sarah shook her head. "Doubtfully" (adverb form) modifies the verb "shook," showing the manner of her action.

Why the others are wrong:
- B (doubt) — A noun; can't describe an action
- C (doubted) — A verb; doesn't fit grammatically after "head"
- D (doubtful) — An adjective; describes nouns, not verbs (you'd need an adverb to modify "shook")

Correct answer: woken up
This is a past participle used with "were" to form the passive voice. The sentence means something (the storm) caused the campers to wake up—the campers didn't actively wake themselves. "Were woken up" correctly shows the action was done *to* them.

Why the others are wrong:
- B (wake up) - This is the base form; it doesn't work after "were"
- C (woke up) - This is simple past tense, which would mean the campers actively woke up themselves (active voice), not that the storm woke them
- D (waking up) - This is a gerund/present participle; it doesn't fit the grammar pattern needed here

Correct answer: A. were

This sentence uses a conditional ("if") statement about an imaginary situation that isn't true right now. In English, we use "were" for all subjects (I, you, he, she, it, we, they) in this type of unreal conditional, even though "were" is normally only for plural or "you." It's a special grammar rule for hypothetical situations.

Why the others are wrong:

• B. am — This is present tense for "I," but we don't use present tense in unreal conditionals.
• C. are — This is for "you/they," not "I," and it's still present tense (not conditional).
• D. was — While this is grammatically possible in casual speech, "were" is the correct formal choice for hypothetical conditionals with "I."

Correct answer: A. finished

After "haven't," you need the past participle form of the verb to complete the present perfect tense ("haven't finished"). This shows an action that started in the past and connects to now.

Why the others are wrong:
- B. finish – Base form doesn't work with "haven't"; you need past participle
- C. finishing – Present participle (-ing form) isn't used with "haven't"
- D. finishes – Third person singular form doesn't fit here; only past participle works with "haven't"

Correct answer: doesn't

This is a tag question. The main clause "She always double-checks" is positive, so the tag must be negative—that rules out B and C. The subject is "she" (third person singular), which requires "does" in the tag question, making it "doesn't she?"—not "don't."

Why the others are wrong:
- B (do) – Wrong form for third person singular; should be "does"
- C (does) – This would be positive, but we need negative to match the positive main clause
- D (don't) – Wrong verb form; "she" takes "does/doesn't," not "do/don't"