中考英语复习--非谓语动词用法

非谓语动词 非谓语动词分为 不定式，动名词和分词（现在分词和过去分词）。 ※不定式※ 一 构成 to+动词原形，一般式 to+do,被动式 to be done.否定式 not to do 复合结构 for sb.to +do sth. 二 作用 1 作主语 常用it 做形式主语 。 It’s adj. +for/of+sb.+to do sth. It’s good of you to help me .It’s good for you to do exercise. 2 做表语 His work is to teach Chinese. 3 作宾语 ① 在动词 find,think,believe,consider,feel,suppose等后不定式作宾语并且后面有宾语补足语时，常用it做形式宾语，真正宾语放宾补后面。 I find it difficult to study English well. ② 只能跟不定式作宾语的动词 afford,agree ,decide,expect,hope,manage,refuse,want,wish, offer,promise,choose,fail等。 ③ 在介词but,expect,besides之前若有do,did done动词，后面常接省略 to 不定式, had better(not)do,why not do,would/could /will you please do ?后面省略to. I can do nothing but wait .I have no choice but to do it. 4 做宾补，放在所修饰的名词，代词之后，ask him to help me prepare sth to do. 常跟不定式做宾补的动词有wish,order,beg,allow,invite,wait for,tell,want,ask,advise,allow, expect,force,help,persuade,teach,drive,encourage,need,get,request. 还有一些使役动词和感官动词用也用不定式做宾补，但不定式要省略to,动词有：feel一