2019届高三英语一轮复习---动词不定式简单用法归类教学课件 (共18张PPT)

WELCOME 动词不定式简单用法归类 1.概述 动词不定式由to加动词原形构成,在某些情况下可以省略to ,相当于名词,形容词和副词,在句中可以做主语,宾语,表语,定语,补语,状语和独立成分. 2.形式: 主动形式 被动形式 一般式 进行式 完成式 to do to be done to be doing to have done to have been done (1).to do I am sorry to hear the news. He is determined to work harder next term. (2).to be doing They seemed to be talking about something important. (3).to have done I’m sorry to have kept you waiting. He is said to have gone abroad. 表示与谓语动词同时或之后发生 与谓语动词同时发生 发生在谓语动词之前 3.不定式的否定式 He got up early in order not to miss the bus. He promised never to make such a stupid mistake. 4. 不定式在句中的作用 (1).主语 To save time is to lengthen life. It’s +形容词of (for) somebody to do. It’s nice of you to help me. It’s necessary for us to follow his advice. (2). His job is to teach English. (3).宾语 ①decide, want, agree, choose, hope, manage, expect, pretend, offer….to do He offered to go with us. ②不定式可以和疑问词一起构成宾语。 I don’t know what to do. He taught me how to swim. ③ it