小学英语一般过去时75220PPT课件

名词变复数变化规则(一)规则变化名词单数变复数，直接加-s占多数；s,x,z,ch,sh来结尾，直接加上-es；词尾是f或fe，加-s之前先变ve；辅母+y在词尾，把y变i再加-es；词尾字母若是o，常用三个已足够，要加-es请记好，hero,tomato,potato。(二)不规则变化男人女人a变e，鹅(goose)足(foot)牙(tooth)oo变ee；老鼠(mouse)虱婆(louse)也好记，ous变ic；孩子加上ren，鱼鹿绵羊不用变。,一般过去时的用法与结构详解,.,时态和时间,表示：,past,now,future,.,动词过去式的构成,规则动词regularverbs,不规则动词irregularverbs,规则动词过去式的构成,.,1、一般在动词末尾加ed（掌握）,lookWalkpaintplaycleanVisitWantcoughwatch,lookedWalkedpaintedplayedcleanedVisitedWantedcoughedwatched,.,2、结尾是e的动词只加-d(了解),livehopeuse,livedhopedused,.,3.重读闭音节词，先双写这个辅音字母，再加ed,stopPat,stoppedPatted(掌握),.,4.以“辅音字母+y”结尾的词，先变“y”为“i”再加ed,studyWorryEarlyHappy,studyiedWorryiedEarlyiedHappyied,不规则动词过去式的构成,.,1.过去式与原形一样(了解),letlet（让）,putput(放下）,cutcut（砍，剪）,readread（读）,letlet（让）,putput(放下）,.,2.把元音字母变成“a”,comecame（掌握）givegaveBecomebecamedrinkdrank（了解）beginbegan,剩余不规则动词,.,剩余不规则动词表,InfinitivePastTenseam,isaredogohavemakeget,InfinitivePastTenseeatsaysee,wasweredidwenthadmadegot,atesaidsaw,一般过去时肯定句变否定句,.,Be动词类否定句实义动词类,.,1（be动词类）在表示过去存在的状态的句子中在was,were的后面加上not。,如：肯定句：Hewasintheparkthedaybeforeyesterday.否定句：Hewasnotintheparkthedaybeforeyesterday.肯定句：Wewerebusylastweek.否定句：Wewerenotbusylastweek.,.,2（行为动词类）要在行为动词的前面加助动词didnt.然后把动词过去式改为动词原形。即：didnt+动词原形,肯定句：Sheplayedtheviolinlastnight.否定句：Shedidntplaytheviolinlastnight.肯定句：Theyswaminthelakeyesterday.否定句：Theydidntswiminthelakeyesterday.,.,一般过去时否定句练习,肯定句:Theymadeakiteaweekago.否定句：Theydidntmakeakiteaweekago.肯定句：Hewasillyesterday.否定句：Hewasnotillyesterday.肯定句：Thecatateabirdlastnight.否定句：Thecatdidnteatabirdlastnight.,一般过去时的一般疑问句,.,1.把was,were放在句首，其余位置不变。,（1）HewasborninShanghai.WasheborninShanghai?(一般疑问句)Yes,hewas.(肯定回答)No,hewasnt.(否定回答),.,一般过去时1一般过去时表示过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用。Yesterday(昨天)，lastnight（昨天晚上），lastweek(上周)LastSunday（上周日）in1990justnow（刚才）,longlongago（很久以前）,.,（2）TheywereinLiYanshomelastnight.WeretheyinLiYanshomelastnight?（一般疑问句）Yes,theywere.(肯定回答)No,theywerent.(否定回答),.,一般过去时一般疑问句及其肯否定回答练习题,Theyhadagoodtimeinthepark.一般疑问句：Didtheyhaveagoodtimeinthepark?肯定/否定回答：Yes,theydid.No,theydidnt.,.,2.Anndidherhomeworkyesterdayevening.一般疑问句：DidAnndoherhomeworkyesterdayevening?肯定/否定回答：Yes,shedid.No,shedidnt.,.,3.IreadanEnglishbooklastweek.一般疑问句：DidyoureadanEnglishbooklastweek?肯定/否定回答：Yes,Idid.No,Ididnt.,.,4.Mybrotherwasintheparkjustnow.一般疑问句：Wasyourbrotherintheparkjustnow?肯定/否定回答：Yes,hewas.No,hewasnt.,.,一般过去时练习题,Herfather_(read)anewspaperlastnight.We_(go)tothezooyesterday._you_(visit)yourrelativeslastSpringFestival?_he_(fly)akiteonSunday?Yes,he_.It_(be)BensbirthdaylastFriday.Weall