现在完成时课件2022-2023学年外研版英语八年级下册

Grammar: Present Perfect Astrid Structure 肯定句:主语+have/ has + done (过去分词)+其它 He has lived in Beijing for 10 years. Structure 一般疑问句:Have/ Has +主语+ done (过去分词)+其它 Has he lived in Beijing for 10 years? Structure 否定句: 主语+have/ has+ not + done (过去分词)+其它 He has not finished his homework. Has not =hasn’t Have not= haven’t 规则动词变化 与过去变化一致 直接+ed , jumped 以e结尾的直接+ d , moved 以辅元辅重读闭音节结尾的单词双写最后一个字母+ed , stopped 以辅音字母+y结尾的,把y变成i再+ed, studied 规则动词变化 词尾读音有3种: a.在浊辅音和元音后读[d],如lived, watered, listened, played。 b.在清辅音后读[t],如liked, helped, watched。 c.在[t],[d]音后读[Id],如planted, wanted, handed(上交)。 部分不规则动词变化 am,is/ are — was/were—have/has been do — did— have/ has done drive— drove— have/has driven fall— fell— have/ has fallen find— found— have/ has found go — went— have/has gone have— had— have/has had Know—knew—have/has known lose— lost—have/has lost make — made— have/ has made run— ran— have/has run sell— sold— have/ has sold speak— spoke— have/ has spoken teach — taught— have/has taught win— won— have/has won write—wrote—have/has written 现在完成时用法 1.表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语,如:already, yet, ever, never, just, before, once, twice (次数)等连用,也可以和包括现在在内的时间状语,如these days, today, recently, this year, so far(=by now)等连用. Can I play outside? I have already finished my homework. 1. Have you _been to Japan? 2.I have _ finished my homework. 3.I have finished my homework _. 4.I haven’t finished my homework _. 5.Have you found him_? ever 现在完成时用法1中 常与表示不明确的时间状语连用,如: just,already,yet,before/ ever,never,有此类副词时,常强调动作完成,不强调动作的持续. just already yet before yet 6.I’ve never been there _. 曾经,多用于疑问句 用于否定句表达还(没)、尚(未)、仍然 用于疑问句表示“已经” 之前,一般位于句末 用于肯定句 用于助动词之后实义动词之前 1.This is the most beautiful park I have _ visited. A.ever B.still C.never D.been 2.—Have you found your lost book_? —No, I haven’t. A.already B.yet C.still D.once 3.—Have you cleaned your room_? —Yes, I’ve_cleaned it. A.already, already B.yet, yet C.already, yet D.yet, already Exercise: 现在完成时用法 2.表示过去发生的动作或存在的状态,一直持续到现在,也许还将继续下去,可以和表示从过去某一时刻延续到现在的一段时