动词不定式动词不定式不定式：to + 动词原形知识梳理：提纲挈领，抓住重点和难点！动词不定式的基本形式是"to + 动词原形"，有时可以不带to。
动词不定式（或不定式短语）没有人称和数的变化，在句子中不能作谓语。
动词不定式仍可保留动词的特点，即可以有自己的宾语和状语。
动词不定式同它的宾语或状语构成不定式短语。
如：to read the newspaper, to speak at the meeting 等动词不定式具有名词、形容词和副词的特征，因此在句子中可以作主语、表语、宾语、宾语补足语、定语和状语：注：作主语用的动词不定式常常为it替代，动词不定式（或短语）放在后面。
例如：It is not easy to learn a foreign language.It took us three days to do the work.动词不定式的否定形式由"not+动词不定式"构成. 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的情况: 在感官动词see，watch，look at，hear，listen to，feel和使役动词make，have，let等所接的宾语中（不定式做宾语不足语），不定式应省去to。
但是在被动语态中不能省。
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) 动词不定式和疑问词连用动词不定式可以和疑问词what ,which, how, where, when 等连用，构成不定式短语。
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.例题解析：举一反三，学的更轻松！翻译下列句子，说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做主语；2、to hear your voice做主语；3、to be a pilot作表语；4、to read and write 作宾语；5、to speak more loudly作宾语补足语；6、to see me作状语；7、to see you作状语；8、to say作定语；9、to see作定语；10、not to open the window作宾语补足语；11、what to buy作宾语；12、dance作宾语补足语（省略to）；13、clean the room作宾语补足语（省略to）；14、to speak English作状语；15、to find his watch 作状语；16、to go there together with me作宾语补足语。
练习与巩固：熟能生巧，取得好成绩！选择最佳答案填空：1. Tell him ______ the light.A. to turnB. not to turn onC. to not turnD. not to turn2. It took us more than two hours _______ the dinner.A. prepareB. preparingC. to prepareD. to be prepared3. We felt the earth _______.A. moveB. moveingC. to moveD. be moved4. The students were made ______ the text ten times.A. readB. readingC. to readD. to be read5. The chair looks rather hard _______, but in fact it is very comfortable.A. to sitB. to sit onC. sittingD. sit6. Nobody knows __________next.A. what to doB. to do whatC. which to doD. how to do7. It is very important ______ us ________these words.A. to, to rememberB. for, to rememberC. for, rememberD. for, remembering8. _______ English well, one must have a lot practice.A. For speakingB. SpeakingC. To speakD. Speak9. I'm going to the library ______ the books.A. returnB. borrowC. to returnD. to lend10. We went to town _________ some shopping.A. doingB. didC. to makeD. to do11. The funny story _______ me laugh.A. makeB. makingC. to makeD. made12. After the final exam, I think all the students want _________.A. stop to have a restB. to stop having a restC. to stop to have a restD. stopping to have a rest13. It is very kind _______ you to help me with my housework. It is hard _____me to do allthe work.A. of, forB. for, ofC. of, toD. to, for14. Many people think it very difficult _______ English.A. to sayB. to learnC. speakD. for speaking15. The teacher asked the students __________ her _______ the word again.A. listen to; to readB. to hear; sayC. to listen to; speakD. to listen to; pronounce16.Remember ______ the book here tomorrow.A. bringB. to bringC. takeD. to take17. ---Let's have a rest, shall we?--- Not now. I don't want to stop _______ the letter yet.A. writeB. to writeC. writingD. and write18. ---This physics problem is too difficult. Can you show me __________, Wang Lin?--- Sure.A. what to work it outB. what to work out itC. how to work it outD. how to work out it19.--- How can I improve my spoken English?--- You have to practise ______ as much as you can.A. speakB. speakingC. spokenD. to speak20. --- How about going hiking this weekend?--- Sorry. I prefer _______ rather than _______.A. to stay at home, go outB. to go out, stay at homeC. staying at home, go outD. going out, stay at home1-5 BBACB 6-10 ABCCD 11-15 DCABD 16-20 BCCBA。