Question

see sb doing sth造句,变一般疑问句,否定句,肯定回答,否定回答

Answer 1

1陈述句：I saw the girl playing by the river.

一般疑问句：Did you see the girl playing by the river?

Yes,I did./ No,I didn't.

否定句：I didn't see the girl playing by the river.