Question

they will have planted a tree. ( change into passive voice )

Answer 1

Hey friend, here's your answer.
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A tree will have been planted by them .
Hope it helps.
Please make it the brainliest.☺️

Answer 2

Answer:  

‘A tree will have been planted by them’ is a passive voice of the given sentence.

Explanation:

In the above referred example, while converting the same into passive voice from active voice:

1. A tree which was object in the given statement became the subject in the answer.

2. They which was subject in the active voice statement became the object of the passive voice statement and the same was changed to ‘them’.

3. Only past participle is used in passive voice. Hence, will have planted was changed to will have been planted in passive voice.