一般现在时它表示1)经常性、习惯性的动作或存在的状态。e.g.Igotoschoolonfoot.Heisverybusynow.2)表示主语的特征、性格、能力、爱好等。e.g.Hecanswim.Iworkhard.IlikewatchingTV.3)表示客观真理e.g.Therearesevendaysinaweek.Themoonmovesroundtheearth.其结构按正常语序,即“主语+谓语+其它”,有时为了起强调作用,时间状语也可提前.其句式变化可分为两种情况1)表示动作,一般人称作主语的,变否定句须在动词前加助动词don’t;变一般疑问句须在句首加助动词do。E.g.Theyhavelunchat12:00.Theydon’thavelunchat12:00.Dotheyhavelunchat12:00?2)单三人称做主语的,变否定句须在动词前加助动词doesn’t;变一般疑问句须在句首加助动词does。E.g.JennyspeaksEnglishverywell.Jennydoesn’tspeakEnglishverywell.DoesJennyspeakEnglishverywell?含有be动词的要在be上做变化.E.g.Dannyisagoodstudent.Dannyisn’tagoodstudent.IsDannyagoodstudent?其时间状语为often、usually、always、sometimes等频率副词,onSaturdays、inthemorning(afternoonevening)、everyday等。做题时常见错误如下:一、be动词与行为动词同时出现在句子中例:Weareplant(plant)thetreesinspring.答案:plant解析:学生往往会用汉语的思维方式去翻译,就成了“我们是在春天植树”。这是学习英语最忌讳的,要看语法是不是正确,在英语中,be是表状态,do是表动作,两种动词不能同时出现在句子中,可记住如下口诀:“英汉语言有差异,be、do不能放一起,仔细琢磨细分析,语法千万要牢记。”专项练习:一、单选1Jenny____inanoffice.Herparents____inahospital.AworkworksBworksworkCworkareworkingDisworkingwork2Oneoftheboys_____ablackhat.AhaveBthereisCthereareDhas3Wewillgoshoppingifit____tomorrow.Adon'trainBdidn'trainCdoesn'trainDisn'train4Hesaidthesun____intheeastand____inthewest.Arose;setBrises;setsCrises,setDrise;sets5WangMei____musicandoften____tomusic.Alike;listenBlikes;listensClike;arelisteningDliking;listen6Jenny____Englisheveryevening.AhasstudyBstudiesCstudyDstudied答案:1B2D3C4B5B6B二、填空1IcantakeLiMingtherewhenhe_____(come)tovisit.2_____yoursister_____(know)English?3Herhome_______________(远离)herschool.4Thepot_____(notlook)likeyoursverymuch.5Where_____you____(have)luncheveryday?6Who_____(想要)togoswimming?7______she_____(do)thehouseworkeveryday?8JennyandDannyusually______(play)gamesintheafternoon.答案:1comes2Doesknow3isawayfrom4doesn'tlook5dohave6wants7doesdo8play二、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.三、在句式变换时易出错例:1DoesJennyhas(has)agoodfriend?2Briandoesn’tlives(notlive)inChina.答案:1Doeshave2doesn’tlive解析:单三人称做主语的一般现在时做句式变化时,可记住如下口诀:“见助动,用原形”。此口诀也可推广用于一般过去时态中。e.g.Hedidn'tgohomeyesterday.四、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。五、对主语的数判断有误例:LiMingwithmeare(be)inBeijing.答案: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.另外,宾语从句中,从句部分若是表示客观真理,不管主句是何时态,从句都要用一般现在时;在时间和条件状语从句中,主句表将来,从句要用一般现在时。1.plays2.gets3.dobrush4.doesdo5.studies6.goes7.watches8.doesread9.doeshave10.doesdo11.dohave