Voice
They have not submitted their classwork regularly.

The class work is not being submitted regularly by them.
The classwork have not been submitted regularly by them.
The class work has not been submitted regularly by them.
The class work are not being submitted regularly.

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Voice
You need to clean your shoes properly.

Your shoes are needed to clean properly.
Your shoes are needed by you to clean properly.
You are needed to clean your shoes properly.
Your shoes need to be cleaned properly.

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Voice
The boy laughed at the lame man.

The lame man was laughed by the boy.
The boy laughed when he saw the lame man.
The lame man was laughed at by the boy.
The boy laughed seeing the lame man.

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