1 现在进行时
2 like to do/doing .stop doing/to do sth
3.非谓语
4.作动名词的时候.即这个动词是主语的时候.
Swimming is my favourate.
5.介词后面的动词大多数+ing.
I come for playing.我来这里是为了玩.for是介词
6.动词后面的动词+ing.
I enjoy playing.
I go swimming.
7.某些口语..
一）固定结构：
1.allow doing (区别：allow sb.to do sth.)
2.keep doing
3.keep /carry on doing
4.keep sb.doing
5.enjoy doing (He enjoys nothing but playing the computer.)
6.finish doing
7.be afraid of doing
8.be worth doing (This piece of music is worth listening to.)
9.be busy doing (They are busy getting ready for the New Year’s Eve.)
10.be/get/become used to doing （We are used to living in the countryside.）
11.dislike doing (She dislikes doing housework.)
12.how about doing//what about doing
13.spend some time (in)doing
14.spend some money (in) buying
15.feel like doing
16.stop/keep/prevent … from doing
17.thank you for doing
18.thanks for doing
19.do some cooking/cleaning/reading/shopping/washing
20.go swimming/fishing/shopping/skating/boating
21.mind doing
22.prefer doing … to doing…
23.practise (practice) doing (He practices speaking English every day.)
24.can’t help doing
25.have fun/difficulty/trouble/problem doing sth.
26.waste time/money doing
27.instead of doing
28.miss doing
29.look forward to doing期望（渴望）做某事 (I'm looking forward to getting your letter.)
30.thank…for doing
31.leave sb./sth.doing (His parents leave his staying at home on weekend.)
二）need,require,want译作“需要”时,跟动词-ing作宾语,主动表示被动,相当于to be done,如：
1.The windows require cleaning.（The windows require to be cleaned.）
2.The patient needs operating on at once.(The patient needs to be operated on.）
3.The flowers want watering.（The flowers want to be watered.）
三）动词-ing在句中作表语：
Our plan is setting up a new car factory.
My job is teaching/driving.
这类词作表语,起解释说明主语的作用,主表可颠倒：Teaching is my job.转换成问句,用what提问：
——What's your job?
——My job is teaching.
四）动词-ing作定语：表示被修饰名词的用途：
There are two reading rooms in our school library.
a reading room其含义是A room is used for reading.
The swimming pool in our school is nearly completed.
the swimming pool其含义是The pool is used for swimming.
