Question

when has the boy left the room
? change the voice​

Answer 1

Answer:

When has the room been left by the room?

Answer 2

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When has the room been left by the boy ?

Explanation ↴

To turn this sentence into Passive ones, the appropriate forms of the 'be' verbs are placed after the 'Wh-word'.

When the active sentence begins with a question word (e.g. when, where, which, why etc.), the passive sentence will also begin with a question word. When the active sentence begins with who or whose the passive sentence will begin with by whom or by whose. When the active sentence begins with whom, the passive sentence will begin with who.