（一）、经常放在这些动词之后，做宾语。如：want, hope, wish, like, begin, start, forget, remember, need, ask, learn, decide, would like, try, offer, plan, refuse, agree, help 等。
其形式为：want to do; hope to do 等。
Eg: Remember to post the letter.
I hope to stay with you.
Eg: I find it difficult to learn English well.（其中it为形式宾语，不定式为真正的宾语）
（2）当两个或两个以上的不定式连用时，后面的不定式往往省略to. Eg: He began to read and write after dinner.
拓展：（1）动词不定式可以和疑问词who(m), which, what, when, how, where (why) 除外等连用，构成动词不定式短语，在句子中做主语、宾语或表语等。 Eg: How to control the water pollution is a big problem. （作主语）
I don’t know how to study English well. (作宾语)
The trouble is whom to invite. (作表语)
（2）“疑问词+动词不定式（短语）”作宾语时，相当于一个宾语从句。 Eg: I don’t know what to do next time.= I don’t know what I should do next time.
如： forget doing like doing begin doing start doing
I like swimming, but I don’t like to swim in such cold weather.
(like swimming表示一种习惯，而like to swim则表示一种具体的动作。)
动名词常用在这些动词的后面做宾语：enjoy, mind, finish, imagine, keep, practice, avoid，admit, deny, suggest等。
To learn a skill is very important for everyone in society.
It is necessary for young students to learn a foreign language.
1. It is＋adj./ n. (＋for sb.／sth.) ＋ to do sth.
用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。例如：
It is interesting to play this game.
It is necessary for you to change your job.
It was impossible for them to complete the task（任务） in such a short time. 考例1：Is ____ possible to fly to the moon in a spaceship?
A. now B. man C. that D. it
用于此句型的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。例如：
What a pity it is for you to have missed such a wonderful film.
2. It is＋adj.＋of sb.＋to do sth.
该句型中只能使用描述某人的品德、特征的形容词，如： kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。例如：
It is friendly of the family to try to make me feel at home in their house.
3. It takes sb.＋some time＋to do sth.
It took us half an hour to ride to the town by bike.
Have you got anything to eat? (to eat修饰anything，位于其后)
I have much work to do.
动词不定式作宾语补足语，放在宾语的后面，表示宾语是什么或怎么样。其后接带to的不定式做宾语补足语的动词（短语）有： ask, tell, like, love, hate, would like, order, teach, want, wish, advise, allow等。
其形式为： ask sb to do sth; tell sb to do sth 等
不定式的否定：not to do 如：ask sb not to do sth
Eg: The doctor asked him to take a good rest at home.
She taught me to write something interesting.
She asked me not to fight with others.
注意：（1）下面动词后面通常接省to的不定式：have, let, make, feel, hear, notice, see, watch.
其形式为： have/let /make sb do sth feel sb do sh
hear sb do sth hear sb doing sth
watch/ see/ notice sb do sth watch/see/notice sb doing sth
(2) help 后接动词不定式做宾语补足语时，不定式符号to可以省略也可以不省略。
Eg: He often helps us (to) do some farming work.
动词不定式表目的时，可放在句子的前面，也可以放在句子的末尾。但在句子前面时，动词不定式常用逗号和句子隔开，而在句子末尾一般不用逗号隔开。 Eg: To get there on time, we set out at five in the morning.
We set out at five in the morning to get there on time.
1. Our teacher often asks us questions in groups.
A. discuss B. to discuss C. discussing D. discussed
2. He promised his old friend during his stay in Tianjin.
A. see B. seeing C. saw D. to see
3. ------ Why are you so excited today?
------ We were told a picnic this weekend.
A. have B. to have C. having D. had
4. It’s relaxing to get close to nature the beauty.
A. enjoy B. enjoyed C. to enjoy D. enjoys
5. ----- I didn’t hear you come in just now.
----- That’s good, we tried any noise, for you were sleeping.
A. not make B. not to make C. to make D. making
6. ----- I’m new here.
----- Don’t worry. I’ll do what I can you.
A. help B. to help C. invite D. to invite
7. The teachers asked us football on the street.
A. don’t play B. not play C. not to play D. to not play
8. She’s not strong enough walking up mountains.
A. to go B. going C. go D. went
9. a book in the library, enter a key word into the computer.
A. To find B. Find C. To write D. Write
10. ----- Which dress do you like best, Madam?
------ Sorry, I can’t decide now.
A. to buy which one B. buy which one
C. which one to buy D. Which should I buy it
11. Try to sing more English songs, and you will find it interesting a
A. learning B. learns C. learn D. to learn
12. The Greens enjoy photos, They always go out with their camera.
A. to take B. take C. took D. taking
13.----- I will go to Harbin for summer vacation. What about you?
----- I haven’t decided where
A. go B. went C. going D. to go
14. Would you please tell me next?
A. how to do B. what to do C. what do I do D. how I should do
15. The girl wasn't to lift that bookcase.
A. too strong B. enough strong C. strong enough D. so strong
16. .For a time his grandmother found accept his new idea.
A. hard B. it hard C. it hard to D. it is hard to
17.As she has never been there before, I'll have someone her the way.
A. show B. to show C. showing D. showed
18.You drive slowly. The roads are wet.
A. had rather B. would rather C. had better D. would better
19.Nothing can make the brave soldier his country.
A. turn against B. to turn against C. to turn to D. turn to
20.In the old days it was difficult for the poor a job.
A. find B. to find C. look D. to look for
21.It was foolish his car unlocked.
A. for him to leave B. of him to leave C. for him leave D. him to leave
22.Remember the newspaper when you have finished it.
A. putting back B. put back C. to put back D. will put back
23.Your flat needs it for you?
A. to clean; to do B. cleaning; doing
C. cleaning; to do D. to be cleaned; doing
24. You’re going to China next year. you should now practice__as much as possible.
A. speak B. to speak C. speaking D. speak about
25. If you don't feel well, you may just_____
A. stopped reading B. stop reading C. stopped to read D. stop to read
26. Alex finished ___ his homework before having supper.
A. do B. doing C. to do D. does
1. My mum wants me (drink) milk every day.
2. He hopes (provide) some money for these poor students.
3. Why do you decide (visit) the museum?
4. Who taught the girl (sing) the English song.
5. We often go to the shop (buy) school things.
Cindy was ill in hospital. We were sorry (hear) that. We decided (visit) her today. We hoped (help) her in some way. Cindy was happy (see) us. She started (talk) with me about her school. She told us that she would like (go) to school soon, but the doctor asked her (stay) in bed for three days. We told her not (worried) about her lessons. We will do everything we can (help) her. Cindy said she would try her best (catch) up with us.