Explanation

• In the passive voice, the subject (my bed) receives the action.
• The verb structure changes to match the tense, making it "has been slept in."
• This construction is appropriate for the present perfect tense.

Last verified on 23-10-2026

Explanation

Active Voice: She was watching a film. (The subject "she" is performing the action)

Passive Voice: A film was being watched by her. (The subject "a film" is receiving the action)

In the passive voice, the focus is on the object (the film) rather than the subject (she).

Explanation

• The puzzle could not be solved.
• The active voice is in the simple past tense with the modal verb could.
• In passive voice, the object “the puzzle” becomes the subject, followed by could not be + past participle (solved).
• The meaning remains the same: nobody was able to solve the puzzle.

Last verified on 22-10-2026

Explanation

• The active-style expression “It is time to learn English” can be changed into the passive form “It is time for English to be learnt.”
• The object “English” becomes the subject of the passive infinitive.
• Learn changes to its past participle “learnt” (also spelled “learned”).

Last verified on 13-10-2026

Explanation

• Correct passive voice: The answer sheets have been checked by the teacher.
• The active sentence is in the present perfect tense: “has checked.”
• In passive voice, the structure is object + has/have + been + past participle + by + subject.
• “Answer sheets” is plural, so has changes to have.
• The past participle of “check” is “checked.”

Last verified on 11-10-2026

Explanation

• Correct passive voice: The assignment had been completed by me.
• The active sentence is in the past perfect tense: “I had completed the assignment.”
• In passive voice, the structure is object + had been + past participle + by + subject.
• The object “the assignment” becomes the subject, and “completed” remains the past participle.

Last verified on 11-10-2026

Explanation

• Tranquilizer should be avoided by us in order to have a good health.
• "Should avoid" changes to "should be avoided" in passive voice.
• The subject "We" becomes "by us" in the passive construction.

Last verified on 11-10-2026

Explanation

• Correct passive voice: Online classes must be conducted by him.
• In the active sentence, “He” is the subject, “must conduct” is the verb phrase, and “online classes” is the object.
• In passive voice, the object becomes the subject, and the modal structure changes to must + be + past participle.
• The past participle of “conduct” is “conducted.”

Last verified on 11-10-2026

Explanation

• The active sentence is “You need not wind this watch.”
• Correct passive voice: This watch need not be wound.
• In passive voice, the object “this watch” becomes the subject, and the verb “wind” changes to its past participle “wound.”
• The modal verb “need not” remains unchanged, followed by be + past participle.

Last verified on 11-10-2026

Explanation

• The data have been collected from several colleges by the research team.
• “has collected” is in the Present Perfect Tense, Active Voice.
• Present Perfect Passive = has/have + been + past participle (V3).

Last verified on 06-10-2026