八年级英语不定式复习讲义.ppt

to+动词原形 ，其否定形式是“not/never to do”/not do. 不定式可以带宾语或状语构成不定式短语，没有人称和数的变化。 一.不定式的句法功能 5. 但使役动词（let .make .have)和感官动词(see .watch.look at .hear. feel)的宾补常省to 例如： 他在找一个房间住。 无什么可担心的。 请给我把刀子来切东西。 7. 动词不定式可以和疑问词构成短语。如： We don’t know how to use the machine. Can you show me how to swim. He didn’t tell me when to leave. 8. 只能跟ving 的动词： finish, enjoy, mind, keep(on), practise, feel like(want), be busy doing . give up, look forward to doing, can’t help doing, 9. 既可以跟动词不定式 又可以跟Ving 的几组动词 而意思无太大区别的： like to do like doing prefer. hate begin start ……. 10. 注意Stop to do 与stop doing ： stop to do 指的是：停下其它的事情，去做不定式的动作。We are so tired. Let’s stop to have a rest. 我们太累了，让我们停下来休息一会儿吧。Stop doing是指停下来正在做的事情。 The students stopped talking when the teacher came in. remember to do 记得要去做 remember doing 记得曾经做过 Please remember to bring your book with you tomorrow. I remember bringing my book this morning. forget doing 曾经做过这件事，但后来忘了 forget to do 忘记要做一件事 （根本没做） I often forget to turn off the light, but I remember turning it off last night. 11. ①find it+adj+to do =find (that) it is to do. ②think it…to do… =think (that) it is adj+to do sth. I found it easy to learn English. =I found it is easy to learn Enlish .Exercise: I felt it hard ______(give) up ______(smoke) 12. It’s time to do sth. It’s one’s duty to do sth It’s one’s turn to do sth Take turns to do sth. It takes sb some time to do sth It costs sb some money to do sth 主语+ adj to do sth * * 不定式的构成: 1.It’s very common to raise money in Canadian and American school. (做主语) 不定式做主语时,常用代词it 来代替不定式结构, 这时 it 被称为形式主语,而作为句子真正主语的不定式则被后置.往往放v.和adj.之后. e.g. To learn English well is not easy. = It’s not easy to learn English well. 不定式的逻辑主语有时用“of/for+名词或代词宾格”构成。 It’s + adj for/of sb to do sth. of/for? It’s difficult_____ me to work out the maths problem. . for You are kind to help me. It’s kind