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：pastnowfuture3规则动词regularverbs不规则动词irregularverbs4规则动词过去式的构成1、一般在动词末尾加、一般在动词末尾加 ed （掌握）（掌握） look Walkpaintplay cleanVisitWantcoughwatch look edWalkedpaintedplay ed cleanedVisitedWantedcoughedwatched62、结尾是、结尾是 e 的动词只加的动词只加 - d (了解了解) live hope uselived hoped used7 3.重读闭音节词，重读闭音节词， 先先双写双写这个辅音字母，再加这个辅音字母，再加ed stopPatstoppedPatted (掌握掌握)84. 以以“辅音字母辅音字母+y”结尾的词，结尾的词， 先变先变“y”为为“i”再加再加ed study WorryEarlyHappystudyied WorryiedEarlyiedHappyied9不规则动词过去式的构成1.过去式与原形一样(了解)letlet（让）（让）putput (放下）放下）cut cut（砍，剪）（砍，剪） readread（读）（读）letlet（让）（让）putput (放下）放下）112.把元音字母变成“a”comecame（掌握）givegaveBecomebecamedrinkdrank（了解）beginbegan12剩余不规则动词剩余不规则动词表剩余不规则动词表InfinitivePastTense am, is are dogohavemakegetInfinitivePastTenseeatsaysee was were didwenthadmadegotatesaidsaw14一般过去时肯定句变否定句Be动词类否定句实义动词类161（be动词类）在表示过去存在的状态状态 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.172（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.18一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.19一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） He was born in Shanghai. Was he born in Shanghai? (一般疑问句)Yes, he was. (肯定回答) No, he wasnt. (否定回答)21一般过去时一般过去时1一般过去时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）22（2）TheywereinLiYanshomelastnight.WeretheyinLiYanshomelastnight?（一般疑问句）Yes,theywere.(肯定回答)No,theywerent.(否定回答)23一般过去时一般疑问句及其肯否定回答一般过去时一般疑问句及其肯否定回答练习题练习题1.Theyhadagoodtimeinthepark.一般疑问句：Didtheyhaveagoodtimeinthepark?肯定/否定回答：Yes,theydid.No,theydidnt.242.Anndidherhomeworkyesterdayevening.一般疑问句：DidAnndoherhomeworkyesterdayevening?肯定/否定回答：Yes,shedid.No,shedidnt.253.IreadanEnglishbooklastweek.一般疑问句：DidyoureadanEnglishbooklastweek?肯定/否定回答：Yes,Idid.No,Ididnt.264.Mybrotherwasintheparkjustnow.一般疑问句：Wasyourbrotherintheparkjustnow?肯定/否定回答：Yes,hewas.No,hewasnt.27一般过去时练习题Herfather_(read)anewspaperlastnight.We_(go)tothezooyesterday._you_(visit)yourrelativeslastSpringFestival?_he_(fly)akiteonSunday?Yes,he_.It_(be)BensbirthdaylastFriday.Weall_(have)agoodtimelastnight.He_(live)inWuxitwoyearsago.Thecat_(eat)abirdlastnight.readwentDidvisitwashadlivedateDidflydid28