Voice
I know him.

He is known by me.
He was known to me.
He is known to me.
He has been known by me.

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Voice
He will do the work tomorrow.

The work would be done by him tomorrow.
The work would be done by him tomorrow.
The work will be done by him tomorrow.
The work will have been done by him tomorrow.

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Voice
He teaches us grammar.

We were teached grammar by him.
Grammar will be taught to us by him.
Grammar was taught to us by him.
We are taught grammar by him.

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Voice
The telegraph wires have been cut.

The telegraph wires have cut by someone.
Someone have cut the telegraph wires.
Someone has been cut the telegraph wires.
Someone has cut the telegraph wires.

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Voice
Someone has lit the fire.

The fire was lit by someone.
The fire had been lit by someone.
You are requested to light the fire by someone.
The fire has been lit by someone.

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