英语时态8种基本时态讲解课件

英语8种基本时态讲解 一概念：英语中表示不同时间发生的动作或存在的状态，需用不同的动词形式表示，这种不同的动词形式称为时态。二种类：（基本时态）一般现在时一般过去时 现在进行时过去进行时 一般将来时过去将来时 现在完成时过去完成时1一般现在时：句型结构：主语.（包括be动词）宾语其他成分 当主语是第三人称单数时，动词词尾加-s或-es 1)表示经常发生或习惯性的动作或状态。He has breakfast at 6:00every day.2)表客观现实和普遍真理。The sun always rises in the east.3)表永远性的动作或状态。He lives in the country.注意：一般现在时通常与always,often,usually 等频度副词以及 every day,sometimes,once a week 等时间状语连用。I always watch TV at 8:00 in the evening.They go home once a week.第三人称单数变化形式。a)一般情况动词在词尾加-e-comes speak-speaks b)以o,s,x,ch,sh结尾的单词在词后加es.do-does go-goes finish-finishes fix-fixes pass-passes watch-watches c)以辅音字母y结尾的单词变y为i加-es.Study-studies carry-carries d)以元音字母y结尾的单词直接加-s.play-plays stay-stays 否定句和疑问句。a)-He is an engineer.-He isnt an engineer.-Is he an engineer?-Yes,he is./No,he isnt.否定句和疑问句。b)-We get up at 7:30 in the morning.-We dont get up at 7:30 in the morning.-Do you get up at 7:30 in the morning?-Yes,we do./No,we dont.c)-He likes music.-He doesnt like music.-Does he like music?-Yes,he does./No,he doesnt.2一般过去时 表示发生在过去的动作或存在的状态，通常与表示过去的时间状语如yesterday,last night,some years ago,in 1990,in those days.等连用。I was a student 6years ago.I went to Beijing last year.句型结构：主语.过去时宾语其他成分 They saw a film last night.否定句和疑问句。a)-He was busy yesterday.-He wasnt busy.-Was he busy?-Yes,he was./No,he wasnt.b)-He smoked last year.-He didnt smoke last year.-Did he smoke last year?-Yes,he did./No,he didnt.c)-He joined the army in 1990.-He didnt joined the army in 1990.-Did he join the army in 1990?-Yes,he did./No,he didnt.4）动词过去式变化规则。a)一般情况下的词加-ed.work-worked call-called b)以不发音的字母e结尾的单词直接加-d.live-lived change-changed smoke-smoked die-died graduate-graduated drive-drove c)以辅音字母y结尾的单词，变y为i加-ed.study-studied carry-carried cry-cried try-tried d)以元音字母y结尾的单词直接加-ed.play-played stay-stayed e)以元音辅音结尾的单词应先双写这个辅音字母然后再加-ed.stop-stopped plan-planned pat-patted f)动词不规则变化：do-did go-went come-came run-ran begin-began drink-drank keep-kept cut-cut set-set let-let 3一般将来时 表示将来发生的动作或存在的状态，常与表将来的时间状语tomorrow,the day after tomorrow,next Sunday,soon,in a few days等连用。句型结构：主语will/shallV.原形（第一人称用shall）I shall go to Shanghai tomorrow.They will have a meeting next week.-She will be 20 years old.be(am,is,are)going to+动词原形 They are going to have a meeting next Sunday.be going to 和will的区别 be going to表示近期、眼下就要发生的事情，will 表示的将来时间则较远一些。He is going to write a letter tonight.He will write a book one be going to含有“打算，准备”的意思，而will则没有这个意思，She is going to lend us her book.He will be here in half an hour.be about toV.原形（意为马上做某事，在时间上指最近的将来）I am about to leave school.不能与表示时间的副词连用。They are about to set out.()They are about to set out soon.()4过去将来时 过去将来时是立足于过去某时，从过去的观点看将要发生的动作或状态。主要用于宾语从句中。基本结构：主语+would/should/was/were going to+V.原形+He said that he would have a meeting next week.They said we should leave school tomorrow.5现在进行时 现在进行时表示现在或现在这段时间正在进行的动作。通常与now,at present 等时间状语连用。基本结构：主语+be(am,is,are)+v-ing+其他成分 You are listening to me carefully now.She is writing a letter this year.Look!They are dancing.We are studying English at present.Its raining hard now.6.过去进行时 表示过去某一时刻或某阶段时间正在进行的动作，通常与 at 6:00 yesterday,at this/that time yesterday,when 引导的时间状语等连用。基本结构 主语+be(was/were)+v-ing+其他成分 It was raining at 7:00 the day before yesterday.They were building a reservoir at this time last winter.7.现在完成时 表示过去发生的动作对现在造成的影响。Ive finished this work.He has ever been to Australia.表示过去某时间已经开始一直持续到现在的动作或状态通常与下列时间状语连用 up to now,in the past,recently,by,for 5 years,since 1994,so far,already,yet,ever,just 基本结构 主语+have/has+P.P(动词过去分词)I have already read this book.Have you read?Yes,I have.No,I havent.What have you read?过去分词的不规则变化 do did done go went gone eat ate eaten come came come have had had see saw seen 注意 含有终止意义或暂短意义的动词不能与 for,since 引导的一般时间状语连用。（buy,begin,die,come,go,join,leave 等）I have had a book for 3 years.I have bought a book for 3 day.(wrong)He has been in the army for 3 years.He have joined the army for 3 years.(wrong)现在完成时与一般过去时的区别：1)现在完成时侧重于对现在的影响；而一般过去时侧重于某一动作发生在过去某个时间或某段时间。即现在完成时侧重于现在的结果，而一般过去时侧重于动作发生的时间。例如：I have seen the film.我看过这部电影。(现在我仍记得电影的内容)I saw the film three days ago.三天前我看了这部电影。(强调是三天前,而不是别的什么时候看的电影)8.过去完成时 表示动作发生在过去某一时间之前已经完成的动作或状态，强调“过去的过去”，常与 by the time,by the end of,before,by 等引导时间的状语连用。基本结构 主语+had+动词过去分词+其他成分 When I got to the cinema yesterday the film had begun already.He had learned English before he came here.2）时间状语不同。现在完成时常与already，yet，just，ever，never，before等副词以及“for+时间段”，“since+过去时间/从句”等时间状语连用；一般过去时则常与“时间段+ago”，just now，yesterday，last week等表示过去时间的状语连用。例如：She has lived here since two years ago.她两年前就住在这里了。She lived here two years ago.两年前她住在这里。Thank you!