Change the following from active to passive: Have the engineers resolved the calibration issue yet?
- (a)Has the calibration issue had been resolved by the engineers yet?
- (b)Has the calibration issue been resolved by the engineers yet?
- (c)Has the calibration issue be resolved by the engineers yet?
- (d)Has the calibration issue resolved by the engineers yet?
Answer
Why
Correct — B. Build the passive in steps.
The object the calibration issue becomes the subject. It is singular, so Have becomes Has.
Present perfect passive is has + been + past participle: has been resolved.
In a question Has goes first, and been resolved follows the subject.
The doer moves into by the engineers, and yet stays at the end → option (b).
Why the others are wrong
- (a)Has the calibration issue had been resolved by the engineers yet? — had been after Has stacks two tenses: has marks the present perfect, had the past perfect. English has no has had been, so the verb phrase breaks.
- (c)Has the calibration issue be resolved by the engineers yet? — be resolved puts the base form be after has. Has must be followed by a past participle, and the past participle of be is been.
- (d)Has the calibration issue resolved by the engineers yet? — Has the calibration issue resolved drops been, which makes the issue the doer of the resolving. Without been there is no passive, and by the engineers has nothing to attach to.
Concept
A passive keeps the tense of the active and changes who stands as subject. The object moves to the front, the verb becomes a form of be plus the past participle, and the doer goes into a by-phrase.
For the present perfect the pattern is has or have + been + past participle, and has or have agrees with the new subject.
In a question only the first auxiliary moves ahead of the subject: Has the issue been resolved?
Watch the auxiliary. The engineers is plural and takes have; the calibration issue is singular and takes has. The tense stays present perfect throughout.
Key facts
- Present perfect passive: has or have + been + past participle.
- The auxiliary agrees with the new subject: the engineers have, the calibration issue has.
- In a passive question the first auxiliary comes before the subject: Has the issue been resolved?
Study next
Common traps
- Keeping Have from the active sentence when the new subject is singular
- Dropping been, which turns the passive back into an active sentence with the wrong doer
The same auxiliary switch is keyed at 11 Sep 2024, 09:00, English Q.1, where The teachers of our school have already taken this training becomes This training has already been taken by the teachers of our school.
A passive question is keyed at 15 Sep 2025, 12:30, English Q.13: Did the analysts anticipate the sudden market downturn? becomes Was the sudden market downturn anticipated by the analysts?
Related PYQs
No directly related past PYQ was found.