人教版英语八年级上册-Unit5-动词不定式语法详解.doc

Unit5 动词不定式语法详解 不定式结构 肯定： to + do sth. 否定：not + to do sth.一、作主语To study hard is very important. It is very important to study hard.注意: 不定式作主语时，通常用it作形式主语, 把真正的主语放在后面。练习 1、It is necessary _us to learn to wait. (of/for) 2、It took them 1,000 yuan _this table. (buy)二、作表语My job is to teach English.我的工作是教英语。The most important thing is to learn something new and have fun.最重要的是学习新的东西和过得愉快三、作宾语1、动词+ to do sth.常用动词有：want / wish / like / would like / hope / plan / try / decide / learn / need / agree / begin / start / forget / remember / manage / seem / fail/ manage/ promise等 e.g. I hope to finish it tomorrow . She plans to go and teach in the country.2、动词疑问词+to do e.g. 我不知道接下来该做什么。 I dont know_ next. 她不能决定买哪本书。 She cant decide_. 练习 1、Dont forget _.(关灯) 2、Sam is learning_. (怎样开车）四、作宾语补足语对宾语进行补充说明1、动词 + 宾语（sb./sth.) + to do sth. 常用动词有：ask, tell, allow, want, expect 等 e.g. The teacher asked her to answer the question. The doctor told me to have a good rest.2、动词+宾语+不带to的不定式, 动词多为感官动词、使动词。一感：feel 二听：hear, listen to 三使：make, let, have 四看：see, notice, watch, look ate.g. Johns mother makes him play the piano every day. We often hear him sing on the playground.五、 作定语I have something important to say.我有重要的事要说I have a lot of homework to do.我有许多家庭作业要做。不定式与所修饰的名词有动宾关系，如果不定式是不及物动词，它后面要有必要的介词。The cat is easy to take care of.这只猫很容易照顾。六、作状语表目的Mrs. Wang went to Shanghai to see her daughter.王太太去上海看她女儿。表原因Were glad to meet you here.我们很高兴在这儿见到你。表结果He is too tired to work on.他太累了而不能继续工作。练习1、Let him _ the work at once. (finish / to finish)2、Do you like listening to other people_? (talk / talking/to talk ) 4、Please tell her _here on time . (come / to come)