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A famous architect designed these buildings.
Someone had stolen my wallet in the bus.
I had done my morning exercises by 7 o'clock.
Several people injured the legs last week.
We haven't delivered any papers.
Some people saw an UFO in the sky above London last month.

These buildings were designed by a famous architect

My wallet had been stolen in the bus.

My morning exercises had been done by 7 o'clock.

Several people's legs were injured last week.

Papers haven't been delivered by us yet.

An UFO in the sky above London was seen by some people last month.