Voice
They have published all the details of the invention.

All the details of the invention have been published by them.
All the details have been invented by the publishers.
All the inventions have been detailed by them.
The publication of the details of invention was done by them.

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Voice
People claim to have seen the suspect in several cities.

The suspect has been the people in several cities.
The suspect was seen by people in several cities.
The suspect is being seen in several cities.
The suspect is claimed to have been seen in several cities.

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Voice
The boy has rung the bell.

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

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Voice
I don't know his whereabouts.

No one knows his whereabouts.
His whereabouts is not known by me.
His whereabouts are not known to me.
His whereabouts had not been known to me.

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Voice
The employer said to the workman, "I cannot pay you higher wages."

The employer told the workman that he could not be paid higher wages.
The employer told the workman that he could not pay him higher wages.
The employer warned the workman that he cannot pay him higher wages.
The employer forbade the workman to pay higher wages.

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