Julie sent me a postcard.

Roy bought a car last month.

1.   ?    Roy didn't buy a car last month.
2.   ?    He didn't buy a car last month.

Susan cleaned the attic.

Shelly sold her camera.

1.   ?    She didn't sell her camera.

Jenny fell of the tree.

Betty read that book last week.

Michael had flu last week.

Nick wrote me an e-mail

Mandy lost her keys yesterday morning.

You did your homework right after lunch yesterday.