He is watching TV in the room.
They were dancing at nine o’clock last night.
There is a boy swimming in the river.
3．在have fun / problems 结构中，如：
We have fun learning English this term.
They had problems getting to the top of the mountain.
Thanks for helping me.
Are you good at playing basketball?
What / How about doing sth?
I’m interested in playing football.
enjoy doing sth. 喜欢做某事
finish doing sth 完成做某事
feel like doing sth 想要做某事
stop doing sth 停止做某事
forget doing sth 忘记做某事
go on doing sth 继续做某事
remember doing sth 记得做某事
like doing sth. 喜欢做某事