Question

they plays ping pong in the afternoon (变一般疑问句, 否回, 肯回,否定句)

Answer 1

一般疑问句：1.What do they do in the afternoon?

2. Do they play ping pong in the afternoon?

3. When do they play ping pong?

有肯定回答和否定回答的为第二种：

否回：No,they don't.

肯回：Yes,they do.

否定句：They don't play ping pong in the afternoon.