4.stop doing sth　 　　　　　　　 停止做某事(原来的事)　

3.feel like doing sth 　　 想要做某事；　

2.finish doing sth；　　　 完成做某事；　　　　　 　

1.enjoy doing sth　　　　 喜欢做某事；　　　　　 　

5.在以下结构中　

4.在介词后面。如：Thanks for helping me.　　　　　　　 Are you good at playing basketball？　

　　　　　　　 What /How about doing sth? 做某事怎么样?　　　　　　 I am interested in playing football.　

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.　

2.在there be结构中。如：There is a boy swimming in the river.　

2.They were dancing at 　nine o'clock　 last night.　

1.在进行时态中。如：　 1.He is watching TV in the room.