Select the correct passive voice of: 'They could not understand the problem.' MCQ with Answer and Explanation

Select the correct passive voice of: 'They could not understand the problem.'
A. The problem could not be understand by them.
B. The problem could not be understood by them.
C. The problem cannot be understood by them.
D. The problem could not understood by them.
Answer: Option B
Solution (By JKSSB Mock Tests)
Modal negative 'could not': Object + could + not + be + past participle + by + subject.

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Practice More Active and Passive Voice Questions

Question #1
Choose the correct active voice of: 'The old bridge had been demolished.'
A. They had demolished the old bridge.
B. They demolished the old bridge.
C. They were demolishing the old bridge.
D. They have demolished the old bridge.

Correct Answer: Option A


Explanation:
Past perfect passive 'had been demolished' → active 'They had demolished the old bridge'.

This question belongs to: English Active and Passive Voice
Question #2
Choose the correct active voice of: 'The painting was admired by everyone.'
A. Everyone was admiring the painting.
B. Everyone had admired the painting.
C. Everyone admires the painting.
D. Everyone admired the painting.

Correct Answer: Option D


Explanation:
Simple past passive 'was admired' → active 'Everyone admired the painting'.

This question belongs to: English Active and Passive Voice
Question #3
Select the correct passive voice of: 'Has the plumber fixed the tap?'
A. Had the tap been fixed by the plumber?
B. Has the tap been fixed by the plumber?
C. Was the tap fixed by the plumber?
D. Is the tap fixed by the plumber?

Correct Answer: Option B


Explanation:
Present perfect interrogative: Has/Have + object + been + past participle + by + subject?

This question belongs to: English Active and Passive Voice