九年级英语现在完成时jwk_prws.ppt

The Present Perfect Tense * 一.Form: 1.肯定句: S (主语)+have/has+PP(过去分词) * 2. 否定句: S (主语)+have/has+not +PP(过去分词) * 3.疑问句 Have/has+ S (主语)+PP(过去分词)? Yes, S+have/has. No, S+have/hasn’t. * 说明：　 助动词have和has可前面的主语缩略为’ve,’s.如 they’ve, we’ve, he’s, it’s; has not=hasn’t have not=haven’t * 二、过去分词的构成 1.+ed work, plant,call 2.e+d live, change, like,love,agree,save hate, move,arrive, skate,hope, use * 3.以重读闭音节结尾，末尾只有一个辅音字母的 双写＋ed. 如：plan, stop,drop,fit(适合), prefer(更喜欢), travel * ４。以辅音字母＋y，结尾，变y为i＋ed try, study, carry, hurry, cry, worry,copy * 三、特征词 already(肯定句) yet(否定句和疑问句) never，ever(疑问句) just (谓语动词之前) before(句末） 　 * in the past/last few years, (过去几年来) so far= up to now,till now,by now these days since/ever since for+ 时间段 * 四、用法 表示过去发生的某一动作对现在造成的影响或结果。 I have already seen the film. Jim has just lost his book. * 四、2.常和表示从过去某一时刻延续到现在的一段时间的状语连用.如： for+时间段 for12 weeks/three minutes since+ 时间点(起点)since 9 oclock this morning * since＋一段时间＋ago＝for＋时间段; since two weeks ago= for two weeks; for a year=since a year ago; since 2000=for 4 years * since+从句(常用一般过去时) The Greens have lived in Beijing since they moved to Beijing from Paris. * 时态填空： ----Are you sure you _______________(lose) the book?----Yes, I ___________(look) for it everywhere, but I still can’t find it. have lost have looked * 2.We ___________ already ___________(copy) these words. have copied * 3. Jim _______________ (just, watch) a football match. He is so tired and hungry. has just watched * 4. ___________you ever _____________(travel) on a train? Have travelled * 5. ---______ they _______ (see) the film yet? ---Yes.They_____________ (see) it already. ----When______they______ (see) it? ----They _______ (see)it just now. ---- Have seen have seen did see saw * 6.---- ________ her sister ____________ (be) to Nanning? ----No,she_________ ( never,be) there before. Has been has never been * 五。瞬间动词和延续性动词的转换 open--- be open; close--- be closed; begin--- be on; finish,end---be over * become---b