不定式跟在一些特定的动词后作宾补:advise, believe, cause，challenge, declare ，forbid, force ，find, hire ，instruct, invite ，permit,persuade, remind, request, require, select ， send, suppose, tell, train, allow, order, urge ，force, encourage
Mum forbad them to play ball in the public garden.
He'd managed to persuade Dad to buy a car for him.
How could you allow him to do something like that?
v. -ing形式还可以充当部分介词的宾语
Don't forget to turn off the lights before leaving your classroom.
式以下词可接不定式，也可接v. -ing形式,意义差别很大:
try to do sth.努力做/企图做某事try doing sth. 尝试做试着做某事
mean to do sth. 打算做某事mean doing sth.意味着 做某事
forget/ remember/ regret to do sth.作还没发生
forget/ remember/ regret doing sth.表 示动“作已发生
go on to do sth.接下来做某事(做另一件事) go on doing sth. 继续做某事(做同 一件事)
stop to do sth.停下来做另一件事 stop doing sth. 停止做某事
can't help doing sth. 禁不住做某事 can't help to do sth. 不能帮助做某事
以下词只接不定式作宾语:afford, agree,determine, decide , refuse，expect, hope,manage , want， fail, wish , ask, pretend ，promise, happen, would like, set out等
Soon the villagers couldn't afford to buy food for themselves.
I managed to get all the ironing done this morning.
I promise to come for a long visit.
“疑问词+不定式”常在decide, know，consider, forget, learn, remember, show ，understand, see, wonder, hear, find out，explain, tell 等词后作宾语
Please show us how to do that.
I can't make up my mind which to buy.
The question is how to put it into practice.
以下词只接v. -ing形式作宾语: advise, admit,enjoy, avoid, appreciate, delay, consider, miss ，finish， practise, imagine, suggest, escape ，resist, risk, can't help, feel like, insist on, setabout等
I avoid working in places which are too public.
People should consider putting some money into the bank.
以下词可接不定式，也可接v. -ing形式，意义基本上相同：prefer，like，love，start，begin，hate，continue，intend等
I prefer going to the cinema tonight.
I prefer to go to the cinema tonight.
I intend to rewrite the story for younger children.
I intend rewriting the story for younger children.
以下词作“需要”讲时，后接V. -ing主动形式表达被动含义:need, want, require( 若用不定式则用tobedone形式)
My car needs washing/ to be washed.
The house wants painting/to be painted.
Your hair needs cutting/to be cut.
