11)使用 - ing分词的几种情况
1.在进行时态中。如：
He is watching TV in the room.
They were dancing at nine o'clock last night.
2.在 there be结构中。如：
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.
4.在介词后面。如：
Thanks for helping me.
Are you good at playing basketball？
5.在以下结构中：
enjoy doing sth乐于做某事
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忘记做过某事
go on doing sth继续做某事
remember doing sth记得做过某事
like doing sth喜欢做某事
keep sb doing sth使某人一直做某事
find sb doing sth发现某人做某事
see/ hear/ watch sb doing sth
看到/听到/观看某人做某事
try doing sth试图做某事
need doing sth需要做某事
prefer doing sth宁愿做某事
mind doing sth介意做某事
miss doing sth错过做某事
practice doing sth练习做某
be busy doing sth忙于做某事
can't help doing sth禁不住做某事
