英语人教版八年级下册现在完成时与一般过去时.ppt

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1、Grammar the Present Perfect Tense（第一课时）一.概念概念 现在完成时表示过去发生的某一动作对现在造成的影响或结果，或者从过去发生一直持续到现在（包括现在）的某个动作或者状态。主要强调的是对现在的影响或者动作、状态持续到现在。now二二.结构结构1.1.1.1.肯定句肯定句肯定句肯定句:have/hashave/has+动词过去分词动词过去分词动词过去分词动词过去分词 Eg.I have finished my work.Eg.I have finished my work.2.2.2.2.否定句否定句否定句否定句:have/has have/has+not+n

2、ot+动词过去分词动词过去分词动词过去分词动词过去分词 Eg.I havent finished my work.Eg.I havent finished my work.3.3.3.3.一般疑问句一般疑问句一般疑问句一般疑问句:Have/HasHave/Has 提到句首提到句首提到句首提到句首Eg.Have you finished your work?Eg.Have you finished your work?Yes,I have./No I havent.Yes,I have./No I havent.三三.用法用法1.表示过去发生或已完成的某一动作对现在造成的影响和结果。上一页下一页

3、EgEg：a.He has just turned off the light.a.He has just turned off the light.(他刚把灯关了。)相当于：He turned off the light just now.The light isnt on now.即关灯这一动作对现在造成的结果和影响：现在灯不亮了。b.I have already had my breakfast.(我已经吃过早餐我已经吃过早餐。)2.表示从过去某一时刻开始一直延续到现在的动作或状态,但动作或状态可能仍在继续。（其动词要用延续性动词如live,teach,learn,work,study,

4、know等.）上一页下一页Eg：a.She has lived here since she was born.自从她出生时就一直住在这儿。（现在仍然住在这儿并且有可能会一直住下去）b.I have learnt English for more than ten years.我已经学了10多年的英语。(现在仍然在学英语并且有可能会一直学下去)四四.时间状语时间状语 常与副词常与副词 just（刚刚）（刚刚）,already(已经已经),before（之之前）前）,yet（一般疑问：已经（一般疑问：已经/否定句：还否定句：还),never(从来都从来都不不),ever(曾经曾经),since(

5、自从自从以来以来),for(长达长达)等连用。等连用。Eg.1.I have never heard of her before.2.Have you ever ridden a horse?3.She has already finished the work.4.Ive just finished my homework.5.He has not come yet.一，单项选择。(B)(B)1.1.Both his parents look sad.Maybe they _whats happened to him.Both his parents look sad.Maybe they

6、_whats happened to him.A.knew B.have known C.must know D.will know A.knew B.have known C.must know D.will know(C C)2.2.Lily Lily _already _in this school for two years._already _in this school for two years.A.was;studying B.will;study A.was;studying B.will;study C.has;studied C.has;studied D.are;stu

7、dyingD.are;studying(B B)3.)3.Harry Potter is a very nice film.I_ it twice.Harry Potter is a very nice film.I_ it twice.A.will see B.have seen C.saw D.seeA.will see B.have seen C.saw D.see(D D)4 4.The famous writer _ one new book in the past two year.The famous writer _ one new book in the past two y

8、ear.A.is writing B.was writing C.wrote D.has written A.is writing B.was writing C.wrote D.has written(B B)5.How long have you _ here.)5.How long have you _ here.A.arrived B.been C.got D.come A.arrived B.been C.got D.come练一练二,按要求完成句子。1、He(has read )a book yesterday.(read)He(has)already(read)30 books.(read)2、The train(has)just(left).（leave）The train (left )here just now.(leave)3、He stayed here last year.(变否定句）He didnt stay here last year.4.He has stayed here for 3 years.(变一般疑问句）Has he stayed here for 3 years?Homework:Write a passage(运用今天所学的现在完成时态写一篇旅游记叙文，题目自定，字数为100字左右)。