条件状语从句课件

AdverbialclauseofconditionAdverbialclauseofcondition

引导条件状语从句最常用的连词if,由if引导的条件状语从句表示在某种条件下某事很可能发生。如:如果你请他帮忙,他会帮你的。Ifyouaskhim,hewillhelpyou.引导条件状语从句最常用的连词if,由if引导的条件状语从句1.if条件状语从句中，主句用一般将来时，从句用一般现在时，主将从现原则2.if条件状语从句中，如果主句有

must，can，may

等情态动词，从句用一般现在时。3.if条件状语从句中，主句是祈使句，从句用一般现在时表示将来。

主祈从现原则。1.if条件状语从句中，主句用一般将来例如：1.Wewillgototheparkifit_____________(rain)tomorrow.2.Youmuststopifthetrafficlight____(be)red.3.Don’twaitformeifI_____(be)late例如：1.WewillgototheparkifIfyoufailintheexam,youwilllethimdown.如果你考试不及格,你会让他失望的。另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时（现在）或过去完成时(过去）。与将来事实相反Would/might/could+v原如:Ifyoufailintheexam,youwIfIwereyou,Iwouldinvitehimtotheparty.如果我是你,我会邀请他参加聚会。IwouldhavearrivedmuchearlierifIhadnotbeencaughtinthetraffic.如果没有堵车,我会到的早一点儿。IfIwereyou,Iwouldinvite其他的连词:unless

conj.除非,若不,除非在……的时候Youwillfailtoarrivethereintimeunlessyoustartearlier.

如果你不早点动身,你就不能及时赶到那儿。

Unlessitrains,thegamewillbeplayed.

除非下雨,比赛将照常进行。其他的连词:unlessconj.除非,若不,除非在另外还有incase,as/solongasIncaseitrains,donotexpectme.如若下雨,就不要等我了。Aslongasyoupromisetocome,I’llwaitforyouuntilyoucome.只要你答应,我就等你来。另外还有incase,as/solongasbutfor

若非,要不是Butfortherain,weshouldhaveapleasantjourney.要不是下雨,我们的旅行肯定会很愉快。Butforyourhelp,weshouldnothavefinishedintime.要不是你帮忙,我们肯定不能及时完成任务。butfor若非,要不是Butfortherai1.

Ifyou____acake,yourhost______verypleased.(take,be)2.

Unlesstheweather____better,I_______athome.(get,stay)3.

He_______homeearlyifhe__________well.(go,notfeel)takewillbegetswillstaywillgodoesn’tfeelIfIseeherI’llinvitehertotheparty.(see,invite)Exercises1.

Ifyou____acake,yourho4.

What____I__ifthey____aboutpolitics?(do,talk)5.

Ifyou_____yourhand,thetaxi_________.(raise,stop)6.I__________anythingunlesshe____me.(notsay,ask)raisewillstopwillnotsayasksshalldotalk4.

What____I__ifthey____7.Thevolleyballmatchwillbeputoffifit________.

A.willrain

B.rains

C.rained

D.israiningB7.Thevolleyballmatchwillb8.—ShallBrowncomeandplaycomputergames?

—No,________hehasfinishedhishomework.

A.when

B.if

C.unless

D.once9.____youtry,youwillneversucceed.

A.If

B.Until

C.Since

D.UnlessCD8.—ShallBrowncomeandplay10.—Theairisfullofsmokeandpeoplearecoughing.

—Itwillgetworse________thegovernmentdoessomethingaboutthepollution.

A.but

B.unlessC.except

D.if11.IwonderifI______time.IfI____time,I’llgowithyou.

A.have;have

B.willhave;willhaveC.have;willhave

D.willhave;haveBD10.—TheairisfullofsmokeThankyou!Thankyou!AdverbialclauseofconditionAdverbialclauseofcondition

引导条件状语从句最常用的连词if,由if引导的条件状语从句表示在某种条件下某事很可能发生。如:如果你请他帮忙,他会帮你的。Ifyouaskhim,hewillhelpyou.引导条件状语从句最常用的连词if,由if引导的条件状语从句1.if条件状语从句中，主句用一般将来时，从句用一般现在时，主将从现原则2.if条件状语从句中，如果主句有

must，can，may

等情态动词，从句用一般现在时。3.if条件状语从句中，主句是祈使句，从句用一般现在时表示将来。

主祈从现原则。1.if条件状语从句中，主句用一般将来例如：1.Wewillgototheparkifit_____________(rain)tomorrow.2.Youmuststopifthetrafficlight____(be)red.3.Don’twaitformeifI_____(be)late例如：1.WewillgototheparkifIfyoufailintheexam,youwilllethimdown.如果你考试不及格,你会让他失望的。另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时（现在）或过去完成时(过去）。与将来事实相反Would/might/could+v原如:Ifyoufailintheexam,youwIfIwereyou,Iwouldinvitehimtotheparty.如果我是你,我会邀请他参加聚会。IwouldhavearrivedmuchearlierifIhadnotbeencaughtinthetraffic.如果没有堵车,我会到的早一点儿。IfIwereyou,Iwouldinvite其他的连词:unless

conj.除非,若不,除非在……的时候Youwillfailtoarrivethereintimeunlessyoustartearlier.

如果你不早点动身,你就不能及时赶到那儿。

Unlessitrains,thegamewillbeplayed.

除非下雨,比赛将照常进行。其他的连词:unlessconj.除非,若不,除非在另外还有incase,as/solongasIncaseitrains,donotexpectme.如若下雨,就不要等我了。Aslongasyoupromisetocome,I’llwaitforyouuntilyoucome.只要你答应,我就等你来。另外还有incase,as/solongasbutfor

若非,要不是Butfortherain,weshouldhaveapleasantjourney.要不是下雨,我们的旅行肯定会很愉快。Butforyourhelp,weshouldnothavefinishedintime.要不是你帮忙,我们肯定不能及时完成任务。butfor若非,要不是Butfortherai1.

Ifyou____acake,yourhost______verypleased.(take,be)2.

Unlesstheweather____better,I_______athome.(get,stay)3.

He_______homeearlyifhe__________well.(go,notfeel)takewillbegetswillstaywillgodoesn’tfeelIfIseeherI’llinvitehertotheparty.(see,invite)Exercises1.

Ifyou____acake,yourho4.

What____I__ifthey____aboutpolitics?(do,talk)5.

Ifyou_____yourhand,thetaxi_________.(raise,stop)6.I__________anythingunlesshe____me.(notsay,ask)raisewillstopwillnotsayasksshalldotalk4.

What____I__ifthey____7.Thevolleyballmatchwillbeputoffifit________.

A.willrain

B.rains

C.rained

D.israiningB7.Thevolleyballmatchwillb8.—ShallBrowncomeandplaycomputergames?

—No,___