不定式：to + 動詞原形

　　知識梳理：提綱挈領，抓住重點和難點！

　　動詞不定式的基本形式是"to + 動詞原形"，有時可以不帶to。動詞不定式（或不定式短語）沒有人稱和數的變化，在句子中不能作謂語。動詞不定式仍可保留動詞的特點，即可以有自己的賓語和狀語。動詞不定式同它的賓語或狀語構成不定式短語。如：to read the newspaper, to speak at the meeting 等

　　動詞不定式具有名詞、形容詞和副詞的特征，因此在句子中可以作主語、表語、賓語、賓語補足語、定語和狀語：

　　注：作主語用的動詞不定式常常為it替代，動詞不定式（或短語）放在后面。例如：

　　  It is not easy to learn a foreign language.

　　  It took us three days to do the work.

　　動詞不定式的否定形式由"not+動詞不定式"構成.  如:

　　Tell him not to be late.

　　The policeman told the boys not to play in the street.

　　4) 不定式省去to的情況: 在感官動詞see，watch，look at，hear， listen to，feel和使役動詞make，have，let等所接的賓語中（不定式做賓語不足語），不定式應省去to。但是在被動語態(tài)中不能省。如：

　　Let me listen to you sing the song.

　　He watched his son play computer games.

　　I saw him run away.------He was seen to run away.

　　The boss make the workers work the whole night.----The workers were made to work the whole night.

　　5) 動詞不定式和疑問詞連用

　　 動詞不定式可以和疑問詞what ,which, how, where, when 等連用，構成不定式短語。如：

　　  The question is when to start.

　　  I don't know where to go .

　　  He showed me how to use a computer.

　　  What to do is a big problem.

　　例題解析：舉一反三，學的更輕松！

　　翻譯下列句子，說出句中不定式的作用：

　　1. To grow plants is very important.

　　2. It is so nice to hear your voice.

　　3. My dream is to be a pilot.

　　4. He began to read and write at the age of five.

　　5. The teacher asked me to speak more loudly.

　　6. Tom came to see me last night.

　　7. I am glad to see you.

　　8.Have you got anything to say?

　　9.There are many places to see in China.

　　10.I asked him not to open the window.

　　11. I don't know what to buy for you.

　　12. I saw him dance.

　　13. He often helps me clean the room.

　　14. They are too shy to speak English.

　　15. He was lucky enough to find his watch.

　　16. I want you to go there together with me.

　　解析：1、To grow plants做主語；2、to hear your voice做主語；3、to be a pilot作表語；4、to read and write作賓語；5、to speak more loudly作賓語補足語；6、to see me作狀語；7、to see you作狀語；8、to say作定語；9、to see作定語；10、not to open the window作賓語補足語；11、what to buy作賓語；12、dance作賓語補足語（省略to）；13、clean the room作賓語補足語（省略to）；14、to speak English作狀語；15、to find his watch作狀語；16、to go there together with me作賓語補足語。

　　練習與鞏固：熟能生巧，取得好成績！

　　選擇最佳答案填空：

　　1. Tell him ______ the light.

　　  A. to turn      B. not to turn on   C. to not turn    D. not to turn

　　2. It took us more than two hours _______ the dinner.

　　  A. prepare     B. preparing      C. to prepare     D. to be prepared

　　3. We felt the earth _______.

　　  A. move       B. moveing       C. to move       D. be moved

　　4. The students were made ______ the text ten times.

　　  A. read        B. reading        C. to read        D. to be read

　　5. The chair looks rather hard _______, but in fact it is very comfortable.

　　  A. to sit        B. to sit on        C. sitting         D. sit

　　6. Nobody knows __________next.

　　  A. what to do     B. to do what     C. which to do    D. how to do

　　7. It is very important ______ us ________these words.

　　  A. to, to remember     B. for, to remember    C. for, remember   D. for, remembering

　　8. _______ English well, one must have a lot practice.

　　  A. For speaking    B. Speaking     C. To speak    D. Speak

　　9. I'm going to the library ______ the books.

　　  A. return     B. borrow       C. to return     D. to lend

　　10. We went to town _________ some shopping.

　　  A. doing     B. did     C. to make      D. to do

　　11. The funny story _______ me laugh.

　　  A. make     B. making    C. to make     D. made

　　12. After the final exam, I think all the students want _________.

　　   A. stop to have a rest    B. to stop having a rest  

　　   C. to stop to have a rest   D. stopping to have a rest

　　13. It is very kind _______ you to help me with my housework. It is hard _____me to do all

　　   the work.

　　   A. of, for     B. for, of     C. of, to     D. to, for

　　14. Many people think it very difficult _______ English.

　　   A. to say    B. to learn     C. speak    D. for speaking

　　15. The teacher asked the students __________ her _______ the word again.

　　    A. listen to; to read      B. to hear; say  

　　    C. to listen to; speak    D. to listen to; pronounce

　　16.Remember ______ the book here tomorrow.

　　  A. bring         B. to bring        C. take       D. to take

　　17. ---Let's have a rest, shall we?

　　   --- Not now. I don't want to stop _______ the letter yet.

　　   A. write       B. to write       C. writing       D. and write

　　18. ---This physics problem is too difficult. Can you show me __________, Wang Lin?

　　   --- Sure.

　　   A. what to work it out           B. what to work out it

　　   C. how to work it out          D. how to work out it

　　19.--- How can I improve my spoken English?

　　   --- You have to practise ______ as much as   you can.

　　   A. speak       B. speaking           C. spoken       D. to speak

　　20. --- How about going hiking this weekend?

　　   --- Sorry. I prefer _______ rather than _______.

　　   A. to stay at home, go out             B. to go out, stay at home

　　   C. staying at home, go out             D. going out, stay at home

　　 1-5 BBACB    6-10   ABCCD     11-15   DCABD     16-20  BCCBA