八年级英语动词不定式用法梳理

八年级英语动词不定式用法梳理(11 页)Good is good, but better carries it.精益求精，善益求善。八年级英语动词不定式用法梳理动词不定式是由“不定式符号 to+动词原形”构成的一种非谓语动词结构。有些动词不定式不带 to，动词不定式可以作句子的主语、表语、宾语、定语、补语、状语或单独使用。不定式保留动词的某些特性，可以有自己的宾语、状语等。动词不定式和它后面的宾语、状语等一起构成短语，叫作不定式短语。一、用作主语多数情况用 it 作形式主语，把真正的主语——动词不定式置于句末，特别是不定式短语较长时。动词不定式作主语，谓语动词用第三人称单数形式。疑问词+不定式短语作主语可置于句首，复合不定式结构作主语常置于句末。如：1. I t is our duty to try our best to deal with these problems.2.The head teacher said it was necessary to talk with his mother. 3.How to learn English well is important. 4.To see is to believe.(眼见为实；百闻不如一见)二、用作表语动词不定式作表语，常说明主语的内容、性质、特征。如： 1.The best way is to join an English club. 2.The first thing is to listen to the teacher carefully. 三、用作宾语1.可以接带 to 的动词不定式作宾语的动词主要有：要求选择同意(ask, choose, agree)，期望决定学习(expect, hope, decide, learn)，宁可假装知道(prefer, pretend, know)，希望想要同意(wish, want, would like / love)。如：1)We decided to talk to some students about why they go there. 2)He prefers to eat white bread and rice.3)Id love to visit Mexico.2.动词 decide, know, learn, show, teach, tell...，介词结构 on...可用疑问词带 to 的不定式短语作宾语，但 why 后面的不定式不带 to。如：1)Could you please tell me where to park my car?2)It gives advice on what to do in lots of different situations. 3.动词 feel, find, make, think 等后面，可以用 it 作形式宾语代替真正的宾语——动词不定式，句子结构是...feel / find / make / ... it+adj. / n.+to do...。如：4. 感知动词 like, love, know 等一般不用进行时态。5.后接动词不定式或 ving 形式作宾语，意思差别较大...