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1、i i| Ji WF 1在句中的成分 1. To obey the laws is important. 2. My wish is to be a doctor> 3.1 want to do it myself 4. We think it important to obey the laws. 5. He has a lot of homework to do. 6. He came to help me with my maths. 1. We allow you to enter the halt主语有时it作形式主语真正的主语是不定式 It is important to o
2、bey the laws.表语 一般紧跟在系动词be, seem, remain,appear, get等的后面宾语不定式用在及物动词的后面例如agrew decide, happen, promise等等。宾语，it为形式宾语，真正的宾语为不定式定语。不定式所修饰的名词或者代词和不定式 形成动宾或者主谓关系A factory which is to produce electricitywill be set up next year目的状语，不定式还可以做结果，原因状语JBe careful not to catch a cold.亠 *I hurried to get there onl
3、y to find him out.宾补。不定式作宾补的时候有时候可以省略to 常用在以下动词之后作宾补advise, allow, wish, Order, want等等。o不定式的时态不定式的一般式to do ； WI am glad to see you.he has decided to give her some money.表示的动作通常与谓语所表示的动作或状态同时 或者几乎同时发生，或是在他之后发生不定式的进行式to be doing I am very glad to be working with you. He pretended to be working hard wh
4、en his boss passed him.表示的动作通常与谓语动词表示的动作同时发生不定式的完成式to have done He happened to have seen the film before The novel is believed to have been translated into Chinese.不定式所表示的动作发生在谓语动作或状态之前不定式的完成式to have done He wanted to have met you at the airport, but he didn't get there in time. We planned to ha
5、ve done good deeds for the poor people last month. |表示过去没有实现的期待或者计划； hoped, promised, wanted, wished, expected, plann ed.不定式的完成式to have done I would like to have given her the gift. He would like to have played the violin at the con cert.不定式的完成式在would like后边表示未能 实现的愿望。不定式的语态主动语态to do被动语态to be done I
6、t is an honor for me to be invited to attend the meeting. Everyone likes the hero to be praised.省略to与省略do We asked him to stay till the next day, but he refused to. Are you a teacher? Yes, and I have to be What we want to do now is lie down and lave a good rest. I didn't say anything but to make
7、 a gesture.固定词组和句型 1. prefer n. (doing) to n. (doing) 2. prefer to do sth rather than do sth 3. would rather do 4. would rather +句子(虚拟语气) 5. advise ( allow, permit, forbid) sb to do advise ( allow, permit, forbid) doing不定式做定语注意:作定语的不定式如果是不及物动词，或者不定式所修饰的名词或代词是不定式的地点、工具等，不定式后面须有相应的介词。He is looking for
8、 a room to live in.There is nothing to worry about.但是，不定式如果修饰的词是place, time, way的时候， 介词可以省略He has no money and no place to live不定式做宾补时省略to的情况不定式在感官动词(feel, hear, listen to, watch, look at, notice, observe)使役动词(let, have, make)后边坐宾补时，省去 to,但是在被动语态中要还原to.Let me hear you play the piano.They made the workers work day and night The workers were made to work day and night.