江苏省海头高级中学高中英语Unit3Grammarandusage教案新人教版选修6___________________________________________________________Step2Learning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,Iwouldhavetotakeitagainattheendoftheterm
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
=_________