一般疑问句：Are they running?
肯定回答：Yes,they are.
否定回答：No,they aren't.
否定句：They aren't running.
They are running.一般疑问句,肯、否定回答.和否定句,急······
一般疑问句：Are they running?
肯定回答：Yes,they are.
否定回答：No,they aren't.
否定句：They aren't running.