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1、Unit3Understandingeachother科目:英语主备人：备课日期：课题M6Unit3Grammarandusage(虚拟语气)第8课时计划上课日期：教学目标1.Havestudentsknowthedifferentkindformsofunrealconditions;2.Havestudentsgrasptheusageofunrealconditions.教学重难点Havestudentsusewhattheyhavelearnedtodoexercisescorrectly.教学流程内容板书关键点拨加工润色Step1:Greetings.Step2:虚
2、拟语气用于条件状语从句中时间if从句的谓语形式主句的谓语形式现在did/werewould/could/should/might+V.(原)过去haddonewould/could/should/might+have+p.p将来1.did/werewould/could/should/might+V2.shoulddo3.weretodoIfIwereyou,Iwouldworkhard.Ifheweretocomeheretomorrow,Iwouldtellhim.Step3:虚拟条件句的特殊情况(1)混合/错综型虚拟语气当条件状语从句表示的行为和主句表示的行为所发生的时间不
3、一致时，称为‘错综条件句’，动词的形式要根据它所表示的时间作出相应的调整。Ifyouhadfollowedmyadvice,youwouldbebetternow.IfIwereyou,Iwouldhavetakenhisadvice.(2)省略if的虚拟语气如果从句中含有were/should/had时，则可以把这三个词置于句首，省略if.采用倒装语序。Ifitshouldhappen,whatwouldyoudo?Shouldithappen,whatwouldyoudo?Ifhehadrecognizedme,hewouldhavecomeover.Hadherecogni
4、zedme,hewouldhavecomeover.(3)含蓄虚拟条件句有时候假设的情况不以if引导的条件从句形式表现出来，而是通过一个介词短语，连词或其他形式表示。常用的词或短语有：without,with,butfor(要是没有),otherwise,or,but等。Withoutyourhelp(=Ifwehadnothadyourhelp),wecouldnothavesucceeded.Butforelectricity(=Iftherewerenoelectricity,therewouldbenomodernindustry.Hefeltverytiredyeste
5、rday,or/otherwisehewouldhaveattendedtheparty.Iwasillthatday.Otherwise,Iwouldhavetaken_partinthesportsmeet.Iwouldhavegivenyoumorehelp,butIwastoobusy。Givenmoretime,hecouldhavedoneitbetter.Amorecarefulpersonwouldnothavemadesomanymistakes.(4)在ifitwere(hadbeen)notfor….句型中的虚拟语气虚拟语气也常用于‘ifitwere/(ha
6、dbeen)notfor….’句型中，意为‘要不是由于…’。Ifitwerenotforpeace,wecouldnotbelivingahappylifetoday.Ifithadnotbeenforyourtimelyhelp,Iwouldhavegonebankrupt.Step4:虚拟语气用在名词性从句中1.主语从句中的虚拟语气这种虚拟语气主要用在itis+形容词（名词，过去分词）+that+主语+should+动词原形（should可以省略）这种结构中。常见的这类形容词有：advisable,anxious,better,desirable,surprising,nat
7、ural,necessary,strange,important,regretful.常见的这类过去分词有：decided,demanded,recommended,requested,desired,required,ordered,suggested.常见的这类名词有：duty,pity,nosurprise,nowonder,regret,shame.Itwassuggestedthathe（should）jointheclubactivities.Itisstrange(
