They have three ping-pong balls改成否定句和 一般疑问句无
问题描述：
They have three ping-pong balls改成否定句和 一般疑问句
无
答
否定句：They don't have three ping-pang balls.
一般疑问句：Do they have three ping-pang balls?
答
否定句：They don't have three ping-pong balls.
一般疑问句：Do they have three ping-pong balls?
肯定回答：Yes,they do.
否定回答：No,they don't.
答
THEY DON'T HAVE THREE PING PONG BALLS.
DO THEY HAVE THREE PING PONG BALLS?
答
They don't have three Ping-Pong balls.
Do they have three Ping-Pong balls？