Question

Turn the following sentences from active voice to passive voice. Keep the same tense in each case: An unseen hand had opened the window. A car ran over our dog. Beethoven composed this piece. The boys have finished their work.

Answer 1

An unseen hand had opened the window. (Past perfect)

The window had been opened by an unseen hand.

A car ran over our dog.  (Past simple)

Our dog was run over by a car.

Beethoven composed this piece.  (Past simple)

This piece was composed by Beethoven.

The boys have finished their work. (Present perfect)

The work has been finished by the boys.