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一般现在时肯定式否定式疑问式Iamastudent.1.一般现在时be动词Iamnotastudent.AmIastudent?He/Sheisnotastudent.Ishe/sheastudent?We/You/Theyarefriends.We/You/Theyarenotfriends.Arewe/you/theyfriends?He/Sheisastudent.肯定式否定式疑问式1.一般现在时Work为例Iwork.Idonotwork.He/she/Itworks.Doesshe/he/itwork?We/You/Theywork.We/You/Theydonotwork.Dowe/you/theywork?He/she/itdoesnotwork.DoIwork?Hegetsupat6:30everymorning.用一般现在时翻译下列句子1.我常常照顾我妹妹。3.他/他们每天早上6:30起床。2.他经常照顾他妹妹。Iusuallylookaftermysister.Heoftenlooksafterhissister.你能试着把上面的句子变成相应的否定句，疑问句吗？Theygetupat6:30everymorning.一般过去时肯定式否定式疑问式1.一般过去时be动词Iwasastudent.Iwasnotastudent.WasIastudent?He/Shewasastudent.He/Shewasnotastudent.We/You/Theywerefriends.We/You/Theywerenotfriends.Werewe/you/theyfriends?Washe/sheastudent?肯定式否定式疑问式1.一般过去时实义动词，以work为例Iworked.Ididnotwork.DidIwork?He/she/Itworked.He/she/itdidnotwork.Didshe/he/itwork?We/You/Theyworked.We/You/Theydidnotwork.Didwe/you/theywork?Theworkersbuiltanewroadlastyear.用一般过去时翻译下列句子1.在2009年的时候，我还是学生3.去年工人们修了一条新路。2.Tom昨天三点开始写家庭作业。Iwasastudentin2009.Tombegantodohomeworkat3o’clockyesterday.你能试着把上面的句子变成相应的否定句，疑问句吗？现在进行时•表示现在正在进行的动作或状态。•构成：•肯定式：be(am,is,are)+doing•否定式:am/is/arenot+doing•疑问式:Is/Are+主语+doing?•标志词:now,look,listen,ateight•Eg:•Look!Tomisplayingchesswithhisgrandfather.•WearehavinganEnglishlesson.一、将下列句子改为否定、疑问句并回答•1.I’mwritingalettertomyfriendnow.•否：________writingalettertomyfriendnow.•问：_________writingalettertomyfriendnow?•Yes,_________.No,_________.•2.Theyarecleaningtheclassroom.•否:They_________theclassroom.•问:_____they_____theclassroom?•Yes,________.No,_________.•二、用所给单词的正确形式填空。•1.What____you____(do)now?I____(swim).•2.____yourfather____(read)anewspapernow?•Yes,he___.No,he____•3.Look!Who_____(give)atalk•4.Listen!MikeandKate___________(sing)•5.He____________(read)now.He_________(notwrite)过去进行时•过去进行时的否定式:•was/werenot+doing•过去进行时的疑问式:•Was/Were+主语+doing?•标志词:•then,atthat/thistime,ateightyesterday,•WhenIcamein,amomentago•翻译下列句子•1.Myfatherwasreadingnewspaperatnineyesterday.•2.LiLeiwastalkingwhentheteachercamein.••3.WhileLiLeiwastalking,theteachercamein.•4.IwaslisteningtothemusicwhileIwasdoingmyhomework现在完成时•动作从过去一直持续到现在，或者过去的动作对现在造成影响。•句子结构sb.+have/hasdone+sth•例句；•Theyhavealreadyfinishedthework.•Theyhaven’tfinishedtheworkyet.•Havetheyfinishedtheworkyet翻译练习•他的同学学英语已经两年了。•HerclassmateshavelearnedEnglishfortwoyears•她的父母自从1988年就住在美国。•HerparentshavelivedinUSAsince1988•我从上个周就拥有了这台新电脑。•Ihavehadthenewcomputersincelastweek。过去完成时•重点记忆动作或事情发生在过去的过去。句子结构：sb.＋haddone＋sth例句：我在你回来之前就已经把晚饭准备好了Ihadfinishedcookingdinnerbeforeyoucameback.练习题•翻译：•在妈妈回来之前我已经把作业做好了。Ihadfinishedmyhomeworkbeforemymothercameback.到那时我已经学会了3000个英语单词Ihadlearned3000Englishwordsatthattime.注意区分•Itisthefirst/secondtimethatsbhave/hasdone•这是某人第几次做。。。。•Itwasthefirst/secondtimethatsbhaddone•那是某人第几次做。。。。•Itisthebest/most+adj.+名词thatsbhave/hasdone•那是某人见过最。。。。•Itwasthebest/most+adj.+名词thatsbhaddone•那是某人曾见过最。。。。