第1个回答 2015-03-24
否定句
Helen and Ann don't play ping-pong
一般疑问
Do Helen and Ann play ping-pong?
肯定回答
Yes, they do. (Yes, they play ping-pong)
否定回答
No, they don't. (No, they don't play ping-pong.)本回答被网友采纳
第2个回答 2015-03-24
Helen and Ann don,t play pinging.
Do Helen and Ann play pinging?
Yes,they do.
No,they don,t