Question

The boy laughed at the man ( change the voice)​

Answer 1

Answer:

the man was laughed by the man

Answer 2

Answer:

The man was laughed at by the boy.

Here, the verb is in past form, so we have used the be-verb form of past tense "was" to change the voice in this sentence.

Be-verb forms

am,is ,are=present

was,were=past

been =perfect (present±past)

being =continuous