1. 常见只能跟doing，不跟to do的动词：appreciate, avoid, consider, enjoy, finish, mind, miss, keep, dislike, doubt, suggest, and practice.
2. 常见只能跟to do, 不跟doing的动词: hope, want, ask, expect, decide, agree, plan, offer, refu, pretend.
3. remember, forget, regret, stop, go on, try 后跟to do和doing意思不关于星的成语同。
1) I remember locking the door when I left.
2) Plea remember to lock the door when you left.
3) He forgot turning off the light.
4) He forgot to turn off the light.
5) They regret ordering the books from abroad.
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6) I regret to inform you that we can’t hire you.
7) They stopped talking.
8) They stopped to talk.
9) He went on speaking of his war experience.
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10)He went on to speak of his experience.
11)She tried hard to find the way.
12)I tried typing in the password.
4. 不带to的不定式（e，watch, notice, hear, make, have，let及其他情况）：
1) I saw him steal that car.
2) He often watches us play chess.
3) Did you notice anyone come in?
4) I hear them sing this song often.
5) What makes you think I’m a spy?
6) Have them come to my party.subtotal函数的使用方法
7) Let me go.
5. 主语中含有动词do的某种形式，后面的不定式省去to：
1) All I did was give him a little push.
2) What he wants to do first is hunt for something to eat.
3) The only thing we can do is spare time for this work.
4) The thing to do now is rest.
四棱豆Rather than 之后的不定式也省去to：
1) Rather than wait any more, I decided to go home by taxi.
2) I decided to write an e-mail rather than telephone.
在except 和but之后，如果其前的句中含有动词do的某种形式，则不定式不带to：
1) He will do anything except lend you money.
2) She can do anything except cook.
3) There was nothing to do but wait.
4) They did nothing but complain.
如果其前的句中不含有动词do的某种形式，则不定式带to：
1) He wanted nothing but to stay here.
2) It had no effect except to give him money.
Why 或why not之后的不定式，不带to：
1) Why run this risk?为什么要冒险？
2) Why go there?为什么到那去？
3) Why not take a vote?为什么不投票表决呢？
不定式的特殊句型so as to
1） 表示目的；它的否定式是so as not to do。
感受春天Tom kept quiet about the accident so as not to lo his job.
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汤姆对事故保持沉默是为了不丢掉他的工作。
Go in quietly so as not to wake the baby.
轻点进去，别惊醒了婴儿。什么样的你
2) so kind as to ---劳驾
Would you be so kind as to tell me the time?
劳驾，现在几点了。
1.I do remember ____the letter but I’ve forgotten when I did it .
a. to post b. posting c. to be posting d. posted
2. Would you mind ____the radio? a. turn on b. turning c. turning on d. being turned
3.Little Franz did nothing but ____all day long. a. to play b. to be playing c. play d. played
4.I’ll tell the worker what needs ____. a. to repair b. repaired c. to be repair d. repairing
5.He looks very happy. He ems ___the exam. a. to pass b. to be pasd c. pasd d. to have pasd
6. __there more than once, he offered to show us round the city.
