Voice
The boy has rung the bell.

The bell was being rung by the boy.
The bell was rung by the boy.
The bell has been rung by the boy.
The bell has been being rung by the boy.

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Voice
Das has posted the letter.

The letter have been posted by Das.
The letter has been posted by Das.
The letter had been posted by Das.
The letter was posted by Das.

ANSWER DOWNLOAD EXAMIANS APP