Question

I saw him crossing the road change into passive

Answer 1

HEY MATE!

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Question- I saw him crossing the road (change into passive)

Answer- He was seen by me crossing the road

Hope it helps you!

Answer 2

⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑
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Passive Voice➙ A sentence where the subject performs the action stated by the verb.

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▶Active voice:-
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I saw him crossing the road.

▶So, Passive Voice is:-
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➙ He was seen by me crossing the road.

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Thanks...✊