Question

they keep birds in an aviary change into passive​

Answer 1

Answer:

When we change into passive voice it will become ''the sky is being flown by the birds''. ... In passive voice object ''sky'' will become subject, ''bird'' will become object. When changing into passive voice verb is always written is past participle form so ''fly'' will become ''flown''.

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Answer 2

Answer:

In an aviary the birds were kept

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