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1、.一般现在时态一、一般现在时的用法1)表示经常性、习惯性的动作或存在的状态。通常与副词sometimes,often,usually,always,everyday(year,month),once(twice,threetimes)aday,等等频率副词(时间状语)连用。e.g.Theyusuallygotoschoolbybike.Itakethemedicinethreetimesaday.实义动词表示“动作”Shehelpshermotheronceaweek.Mary’sfatherisapoliceman.Therear
2、e50studentsinmyclass.Be动词表示“状态”Heisverybusynow.be、do不能放一起,如果非要放一起,do后要加ing,变成现在进行时。2)表示主语的特征、性格、爱好等。e.g.Iworkhard.IlikewatchingTV.3)表示客观真理e.g.Therearesevendaysinaweek.Themoonmovesroundtheearth.Thesunrisesintheeastandsetsinthewesteveryday. TomorrowisTuesday.二、一般现在时的句子转换
3、:肯定句否定句一般疑问句及回答TheywatchTVatsixeveryday.Theydon’twatchTVatsixeveryday.---DotheywatchTVatsixeveryday.---Yes,theydo./No,theydon’t...ShewatchesTVatsixeveryday.Shedoesn’twatchTVatsixeveryday.---DoesshewatchTVatsixeveryday.---Yes,shedoes./No,shedoesn’t.he/tommyisEnglish.We/
4、danandmarkarehere.he/tommyisn’tEnglish.We/danandmarkaren’there.Ishe/tommyEnglish?AreWe/danandmarkhere?三、一般现在时的结构:“主语+谓语+其它”,有时为了起强调作用,时间状语也可提前.三单变化:1)多数在动词后+s :play—plays like—likesask---asks work---works get---gets stay---stays2)以字母s,x,ch,sh或o结尾的动词,+-es:watch-
5、--watches wish---wishes fix---fixes do---doesgo---goes pass---passes3)以“辅音字母加-y”结尾的动词,要先变y为i+-es.try---tries study---studiescry---cries fly---flies不规则变化:be----is are have----has做题时常见错误如下:1)、be动词与行为动词同时出现在句子中例:Weareplant(plant)thetreesinspring.答案
6、:plant2)、单三人称形式易出错例:1Heplaies(play)footballverywell...2Dannygos(go)toschoolat7:10.答案:1plays2goes解析:1以辅音字母加y结尾的动词变单三人称形式才能把y换成i再加es;2与名词变复数不同,变单三人称形式以o结尾的词要加es.3)、在句式变换时易出错例:1DoesJennyhas(has)agoodfriend?2Briandoesn’tlives(notlive)inChina.答案:1Doeshave2doesn’tlive解析:口诀:“
7、见助动,用原形”。此口诀用于一般过去时态中。e.g.Hedidn'tgohomeyesterday.4)、对do的理解易出错例:Wedon’t(notdo)ourhomeworkintheafternoon.答案:don’tdo解析:do是一个比较难理解的词,它有三个含义:a)是所有行为动词的总称;b)是助动词,无实义;c)是一个具体的行为动词“做,干”。此句中给出的do指“做,干”,not指把此句变为否定句,故须在do前加助动词don’t。5)、对主语的数判断有误例:LiMingwithmeare(be)inBeijing.答案:
8、is解析:表面一看是“我和李明两个人在北京”,但with在此做伴随状语,不能做主语,故用is...一般现在时练习一.选择填空。7分(14*0.5)1.Iwant____homeworknow.A.doingB.todoC.todomy