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《unit 3 grammar and usage 教学设计》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Unit3Grammarandusage教学设计Step1lead-inAsktheSsthedefinitionoftheunrealconditionalsStep2Learning时间从句主句与现在事实相反If+主语+动词的过去式(be-were)…主语+would/could/might+动词原形与过去事实相反If+主语+had+过去分词主语+would/could/might+have+过去分词与将来事实相反If+主语+wereto/(should)+动词原形主语+would/could/might+动
2、词原形注:当从句的if省略时，句子要倒装，如IfIwereyou,Iwouldnotdothat.___________________,Iwouldnotdothat.在ifI/he/she/it之后,可用were代替was。两者在意义上没有区别,但是were更为正式,特别是在称述心存怀疑的事情时:Ifshewereready,wewouldgo.在与将来事实相反的条件从句中,我们可以用wereto或should+do来表示,如:IfIweretofailmyEnglishtest,Iwouldhavetota
3、keitagainattheendoftheterm.Ifheshouldcometomorrow,Iwouldtalktohimaboutit.虚拟条件句中的省略与倒装在非真实条件句中,如果有were,had,should,我们可以将if省略,把这些词置于句首,采用倒装形式,如:♦IfIshouldmeether,Iwouldtellher.=______________________,Iwouldtellher.♦IfIwereinyourposition,Iwoulddoitbetter.=_______
4、_______________,Iwoulddoitbetter.♦Iftheyhadmadepreparations,theywouldhavesucceeded.=________________________,theywouldhavesucceeded.Step3Furtherlearning●错综时间条件句非真实条件句中,主句谓语动词所表示的动作和条件从句中谓语动词所表示的动作并不同时发生,这时动词的形式并不完全按照上述表格来进行,而需要按照各自的时间来调整,这样的句子就叫错综时间条件句。e.g.1)
5、Ifyouhadfollowedthedoctor’sadvice,thenyouwouldbeallrightnow.2)IfIhadn’tfinishedmycompositionbynow,Iwouldbeworkingonittomorrow.3)Ifshehadpreparedwellforherlessonsyesterday,shewouldn’thavesomanydifficultiesnow.●含蓄条件句有时一个假设的情况并不用条件从句表示,而用其它方式来表示,这样的句子叫含蓄条件句。1.用w
6、ith,without等介词短语或分词短语或者独立主格结构来代替条件从句。Wemighthavediedwithoutyourhelp.=Wemighthavediedifyouhadn’thelpedus.Havingknownintime,wecouldhavestoppedit.=Ifwehadknownintime,wecouldstoppedit.Step4高考链接1.Ihavenoideawhathewilldowiththemallandittookupalotoftime.(P42)[考点1]id
7、ea作先行词时的同位语从句。[考例]Doyouhaveanyidea_____isactuallygoingonintheclassroom?(辽宁2005)A．thatB．whatC．asD．which[考点2]takeup[考例1]Afterheretiredfromoffice,Rogers_____paintingforawhile,butsoonlostinterest.(山东2006)A.tookupB.savedupC.keptupD.drewuptakeup在这里是“开始学习”的意思。saveup
8、储蓄；keepup维持,继续；drawup拟定,起草。Step5Discussion:Whatwouldyoudoifyouhada…?MagicLantern,MagicBrush,MagicStick,TimeMachineStep6巩固练习1._______forthefreetickets,Iwouldnothavegonetothefilmssooften.A.
