Explanation

In passive voice, the auxiliary verb "is/are" in the present continuous tense is changed to "was/were" in the past continuous tense.

The main verb remains in the past participle form.

For example:

Active: "The book is being read by the students."

Passive (Past Continuous): "The book was being read by the students."

Explanation

Prizes were given away to the prize winners by the Chairman.

In the passive voice, the object of the active sentence becomes the subject, and the focus is on the action.

Explanation

The traitors should be shot dead.

In passive voice, the subject (traitors) receives the action, and the auxiliary verb "should" remains unchanged.

The structure changes from "They should shoot" to "The traitors should be shot."

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.

Explanation

The house was built by my father.

The original sentence is in simple past tense ("built"), so the passive form should be in simple past too.

Passive voice: Subject + was/were + past participle + by + agent.

Explanation

In passive voice, the object (the piano) becomes the subject, and the verb form changes accordingly.

"Who" changes to "By whom," and the correct structure is "By whom was the piano stolen?"

Explanation

The sentence is in present perfect tense ("has picked").

In passive voice: Object + has/have been + past participle → "My pocket has been picked."

Explanation

Present Indefinite Tense

Active Voice Formula: Subject + Verb + Object.

Passive Voice Formula: Object + Is/Am/Are + Third form of a main verb + by + Subject

Explanation

May a new car be purchased soon by you.

In passive voice, the object ("a new car") becomes the subject.

The correct structure is "May + be + past participle (purchased)."

Explanation

Direct to Indirect: "I saw him here." → She told me that she had seen him there.

Changes: "saw" → "had seen" (past perfect), "here" → "there" (change in place).