Voice
Someone saw him picking up a gun.

He is seen picking up a gun by someone.
He was seen by someone pick a gun.
He was seen pick up a gun by someone.
He was seen picking up a gun by someone.

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Voice
Before festivals the shops are thronged with men, women and children making various purchase.

The shops are thronged by people making purchases.
Men, women and children throng the shops before festival making various purchases.
During festival people throng the shops.
Men, women and children make purchases during festivals.

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Voice
The poet read his long poem himself.

The long poem is read by the poet himself.
The long poem read by the poet himself.
The long poem was read by the poet himself.
The long poem had been read by the poet himself

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Voice
Who gave you ice-cream?

By whom were you given ice-cream?
Who had given you ice-cream?
Who has given you ice-cream?
By whom was you given ice-cream?

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