1、,M9andM10,郭中阳,动词不定式是一种非限定性动词，非限定动词是指那些在 句中不能单独充当谓语的动词，分为不定式，动名词，现 在分词和过去分词，由to动词原形构成，但在有些情况 下to可以省略。在句中不能单独作谓语。它具有动词的性 质，本身可以带宾语和状语。动词不定式在句中可以作除 了谓语之外的任何成分，还可用在复合结构中，而且有完 成式、进行式、完成进行式和否定形式。,动词不定式式,一般式 （not） to make （not） to be made完成式 （not） to have made （not） to have been made进行式 （not） to be making完
2、成进行式 （not） to have been making,动词不定式的语法功能,动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种：,(1)把不定式置于句首。如： To get there by bike will take us half an hour. (2)用it作形式主语，把真正的主语不定式置于句后，常用于下列句式中。如： Itbe名词to do Its our duty to take good care of the old. It takes sb+some time+to do How long did it take you to finish the wor
3、k? Itbe形容词for sbto do It is difficult for us to finish writing the compositionin a quarter of an hour. Itbe形容词of sbto do It is stupid of you to write down everything the teachersays. It seems(appears)形容词to do It seemed impossible to save money.,例题,1）Tell him _ the window. A. to shut not B. not to shut C. to not shut D. not shut 答案：B。,2) She pretended _ me when I passed by. A. not to see B. not seeing C. to not see D. having not seen 答案：A。,3）Mrs. Smith warned her daughter _ after drinking. A. never to drive B. to never driver C. never driving D. never drive 答案：A。,THANK,
