动词ing形式和动词不定式

1.可以接带to的动词不定式作宾语的动词主要有：要求选择同意(ask, choose, agree)，期望决定学习(expect, hope, decide, learn)，宁可假装知道(prefer, pretend, know)，希望想要愿意(wish, want, would like / love)。如：

1)We decided to talk to some students about why they go there.

2)He prefers to eat white bread and rice.

3)Id love to visit Mexico.

2.动词decide, know, learn, show, teach, tell...，介词结构on...可用疑问词带to的不定式短语作宾语，但why后面的不定式不带to。如：

1)Could you please tell me where to park my car?

2)It gives advice on what to do in lots of different situations.

3.动词feel, find, make, think等后面，可以用it作形式宾语代替真正的宾语——动词不定式，句子结构是...feel / find / make / ... it+adj. / n.+to do...。如：

I find it difficult to remember everything.

4.既可接动词不定式又可接ving形式作宾语，意思差别不太大的动词有begin, start, like, love等。一般说来，动词不定式表一次、数次的具体动作、将来动作或动作的全过程，ving形式表习惯性的连续动作。但是这种区别并不很严格，特别是美国英语，即使是习惯性的动作也可以用动词不定式。如：

1)Then I started to watch English-language TV.

2)I’m beginning to understand my Chinese roots, and who I am.

begin用了进行时态，后面只接不定式作宾语，表示事情刚开始，还要继续下去。

3)I like to eat vegetables.
感知动词like, love, know等一般不用进行时态。

5.后接动词不定式或ving形式作宾语，意思差别较大的动词有forget, remember等。后接不定式作宾语，表动作尚未发生；后接ving形式作宾语，表动作已经发生。stop to do停下来做另外一件事，to do是目的状语；stop doing停止做、不做当前这件事，doing是宾语。try to do尽力做，try doing试试看；go on to do接着做另外的事，go on doing继续做原来的事。

6.动词hear, see, feel, watch, notice, look at, listen to等后面的动词不定式作宾语补足语时不能带to, 即常见的形式为: hear sb do sth等
Many people like to watch others play games. 许多人喜欢看别人玩游戏.
7.let, make, have后面的动词不定式作宾语补足语, 也不能带to; help后面的动词不定式作宾语补足语, to可有可无
She let us meet her at the station, but she didn’t come. 她让我们去车站迎接她,卡她没有来.
8.这两种情况下的动词不定式在改被动语态句子时,必须将省略的to还原,也就是说,动词后需跟带to的动词不定式.
We heard him sing every day.
He was heard to sing every day. 那时每天都听到他唱歌.

stop,like ,forget ,remember等词
stop doing停下正在做的事
stop to do停下正在做的去做另外的事
like doing习惯性的喜欢
like to do 一次性的喜欢
forget doing忘了做过某事
forget to do忘了将要做某事
remember就是记得做过和将要做的事
to do可以表示将来的。