Grammar Focus -- 4c八下英语Unit 2 I’ll help to clean up the city parks. volunteer愿者help old peoplegive out food at the food bankcheer up sick childrenThey are putting up signs around the school.clean up the park不定式 The Infinitive “to do” 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，to是动词不定式的符号。动词不定式没有人称和数的变化。不定式的否定形式为not+to+动词原形。动词不定式和其后面的名词等构成不定式短语。动词不定式相当名词，形容词，副词.在句子中可以作主语、表语、宾语、宾语补足语、定语、状语等。本单元主要学习作宾语，宾语补足语，定语，状语的用法。动词不定式??? 一. 作宾语 ??? 动词不定式（短语）可以放在一些动词后面,用作宾语，下列动词接不定式作宾语：hope ,decide ,begin, want, remember,forget, agree, learn, would like, decide, 等。例： 1.I want to tell you a story. 2.Don’t forget to lock the door. 3.Would you like to go shopping with me???? 二. 作宾语补足语。表示宾语所做的动作。下列动词接不定式作宾语补足语 tell, ask, want, like, invite, help等。1.The teacher asked us to read English for half an hour in the morning.2.Tom’s father often tells him not to spend too much time playing computer games. 感官动词see,watch,hear,feel,notice等和使役动词let,have,make后面接省to的动词不定式作宾语补足语（主动语态）。 Let / have / make + sb. +do sth.The boy made the baby cry.See/watch/hear/feel/notice+sb.+do sth.I saw the students play basketball on th |
