if条件状语从句课件

RevisionAdverbialClauseofConditionif引导的条件状语从句-----------复习课RevisionAdverbialClauseofCo1Ifyouarehappy,whatwillyoudo?

IfIamhappy,Iwillsmile.Ifyouarehappy,whatwillyo2Ifyoubecomesad,whatwillyoudo?IfIbecomesad,Iwillcry.Ifyoubecomesad,whatwilly3Sheisdoingherhomework.Ifyouarehard-working,youwillgetgoodgrades.Shegetsgoodgrades.Sheisdoingherhomework.Ify4Ifyouplaycomputergamesonweekdays

,you’llbeverytiredinclassyourparentswillbesad.youwon’tgetgoodgrades.youreyeswillbepoorIfyouplaycomputergameson5Shewillbelate.Ifshe_____toschool,she________late.Sheisgoingtowalktoschool.walkswillbeLead-inShewillbelate.Ifshe_____61)条件状语从句通常由if或unless(=ifnot)引导，从句中常用一般时代替将来时，即if或unless后的句子谓语用一般现在时。但是，主句则通常用将来时，情态动词或祈使句。

时态－－主将从现主句一般将来时，从句一般现在时1)条件状语从句通常由if或unless(=ifnot)71.

如果主句是一般将来时，从句则用一般现在时。

Ifitrains（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时。

Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，从句同样要用一般现在时。

Don’tgoandplayfootballifyoudon’tfinishyourhomework.

PleasecallmeifhecomesnextSunday.if条件状语从句结构及时态Revisionif条件状语从句结构及时态Revision8

If引导条状语从句时，从句中用一般现在时代替一般将来时。1.Ifhe______(go)tothemovies,hewon’tfinishhiswork.goes2.IfI________(become)adoctor,Icanhelpothers.become3.Ifwe_______(have)time,wewillgototheparktomorrow.have4.如果你去，我也去。Ifyougo,Iwillgo.5.如果明天下雨，请带雨衣。raincoatPleasetakearaincoatifitrains.excellentIf引导条状语从句时，从句中用一般现在9Ifyouarefreethisweekend,whatwillyoudo?IfIamfree,…sleepwatchTVplaycomputergamespracticeIfyouarefreethisweekend,I10Ifyouwanttogetgoodmarks,

dowhat?Don’tdowhat?Ifyouwanttogetgoodmarks,__________.Ifyouwanttogetgoodmarks,don’t__________.studyhardlistentoteacherscarefully.dohomeworkbyyourself.

copyyourhomework.talkintheclasscheatintheexamsIfyouwanttogetgoodmarks,11Ifyouhaveenoughpocketmoney,whatwillyoubuy?IfIhaveenoughpocketmoney,I____________________.Ifyouhaveenoughpocketmone12IfyouinviteforeignerstoChina,wherewillyougo?Iwillgoto_________,ifIinviteforeignerstoChina.MountTaiWestlakeHainanIfyouinviteforeignerstoCh13If条件句的替代形式：

（1）祈使句+and/or+陈述句（谓语动词通常用将来时态）。其中，and表示句意顺承；or表示转折，意为“否则”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.verygoodIf条件句的替代形式：verygood14（2）用介词with,without的替代形式：

e.g.Ifthereisnowater,thefishmaydie.

=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.

=Withyourhelp,I’llfinishmytaskontime.（2）用介词with,without的替代形式：15Activity1Rewritethesentenceswithif:Listeninclass,oryouwon’tunderstandwhattodo.Ifyoudon’t

listeninclass,youwon’tunderstandwhattodo.1)Eatbreakfast,oryou’llgethungryatschool.2)Hurryup!We’llbelate!Ifyoudon’teatbreakfast,you’llgethungryatschool.Ifyoudon’thurryup,we’llbelate.Activity1Rewritethesenten16Activity2.Completethesentences—Iwanttogethighscores.—If__________________________(workhard/dowell)youworkhard,youwilldowell.1.-howcanIremembermyfriends’birthdays?-If_______________________________________(keepanoteinyourdiary/notforget).2.-It’slate,butIdon’twanttogotosleep.-If_______________________________________(notgetenoughsleep/feeltiredatschool).youkeepanoteinyourdiary,youwon’tforget.youdon’tgetenoughsleep,you’llfeeltiredatschool.Activity2.Completethesentenc17if引导的条件状语从句和if引导的宾语从句的区分:If在宾语从句中翻译为“是否”If在条件状语从句中翻译为“如果”I’llgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.if在句中的含义不同if引导的条件状语从句和if引导的宾语从句的区分:If182.if在从句中的位置不同If引导的宾语从句放在主句之后；而if引导的状语从句可放在主句之前也可放在主句之后=Ifitdoesn’train,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesn’train.Idon’tknowifthetrainhasarrived.

If引导的条件状语从句放于句首时多用逗号隔开；而if引导的宾语从句则不能。2.if在从句中的位置不同If引导的宾语从句放在主句之193.时态要求上有区别If引导条件状语从句的时态为一般现在时记住“主将从现”

1.Iwanttoknowifthere

asportsmeetingnextmonth.doesn’trainwillbe2.Ifit

doesn’train,we’llgooutIf引导的宾语从句的时态由主句及本身时态决定；3.时态要求上有区别If引导条件状语从句的时态为一般现在20找出下列句子中哪些是if条件状语从句，哪些是if宾语从句1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Ican’tguessifshewillbeangry.4.Ifwehelpeachother,wewillgetgoodresults.找出下列句子中哪些是if条件状语从句，哪些是if宾语从句1.21If引导的条件状语从句的练习1

IfI_______________(notunderstand）,Iwillaskmyteacherforhelp.IfI__________(copy)yourhomework,Iwillcheatmyself.3Ifshe_______________(notget)upearly,she’llmisstheearlybus.4Ifyourmother_______(buy)thebookforyou,itwillbegoodforyourstudy.

don’tunderstand

copy

doesn’tget

buysIf引导的条件状语从句的练习1IfI________225.Ifyou____________(notwork)hard,you_________(notpass)theexam.6.Ifyourbrother____________(break)thewindow,hewillfeelverysorryforthat.7.Ifthecomputer

(notwork),menditplease.don’tworkwon’tpassbreaksdoesn’twork5.Ifyou____________(notwor238.Ifshe_______(notbe)interestedinmath,shewillfinditveryboring.9.Ifyou_________(get)highscores,yourparentswillbeproudofyou.10.Ifyou_________(be)happy,wewillbehappy.isn’tgetare

8.Ifshe_______(notbe)inte24.Iwanttoknowifhe_______(come)tomorrow,ifhe_______(come),I__________(give)themessagetohim.

eswillcom25summaryif的用法2.引导条件状语从句：译为“如果，假如”(1)if从句+祈使句(2)if从句+主句（一般将来时）(3)if从句+主句（含有情态动词）

1.引导宾语从句：译为“是否”，表示不确定的概念。Idon’tknowifyourfathercancometogether.Canyoutellmeifmissyourparents?summaryif的用法2.引导条件状语从句：译为“如果，假261.Ifyou_____totheparty,you’llhaveagreattime.A.willgo

B.went

C.go

D.going2．I____hertheanswerifshe____me.A.cantell,willask

B.willtell,willask

C.wouldtell,ask

D.willtell,asksCD3.–Whatareyougoingtodotomorrow?

--We’llgotothelibrarytomorrowifit___.A.isn’train

B.rain

C.won’train

D.doesn’train4.Whatwillyoudoifyou_____totheoldfolk’shomevisit?A.go

B.went

C.going

D.willgoAD1.Ifyou_____totheparty,y275.IfIeat____food,I’llbeveryfat.A.toomanyB.manytoo

C.toomuch

D.muchtoo6.I’llgivethebooktohimifhe___herenextSunday.A.willcome

B.comes

C.iscoming

D.came

7.There____anEnglishfilminourschooltomorrow.A.isgoingtohave

B.willhave

C.isgoingtobe

D.has8.Couldyoutelluswhere____？A.willthenextOlympicGamesheld

B.thenextOlympicGameswillbeheldC.wouldthenextOlympicGamesbeheldD.thenextOlympicGameswouldbeheldCCBB5.IfIeat____food,I’llbe28If引导的非真实性条件状语从句（虚拟语气）

(A)与现实事实相反

主：过去将来时

从：过去时

If

they

were

here

,they

would

help

you.

(B)与过去事实相反

主：should/would

+have

+v.(p.p.)

从：had+v.(p.p.)

E.

If

he

had

worked

harder

,he

would

have

succeeded.If引导的非真实性条件状语从句（虚拟语气）

(A)与现实事29BYTHETIMEbythetime+一般过去时，从句过去完成时bythetime+一般现在时，从句现在完成时BYTHETIMEbythetime+一般过去时，30nerd

n.令人厌烦的人；愚蠢的人；落伍的人；电脑迷shrugv.耸肩（表示不知道或不在乎）shrugsthoff/aside不把…当回事；对…满不在乎；对…不予理睬dirtn.泥土;污垢，污泥;下流想法;恶意中伤的话Hisclotheswerecoveredindirt.他的衣服沾满了污垢。nerd

n.令人厌烦的人；愚蠢的人；落伍的人；电脑迷shr31handn.手;协助，帮助;（工具等的）把，柄;掌管vt.传递，交给;搀扶;支持Severalofhiscolleagueshadahandinhisdownfall.他的几位同事对他的下台起了作用。gratituden.谢意;感激，感谢;感激的样子;恩义Hesmiledatthemwithgratitude.他向他们笑了笑表示谢意hand32RevisionAdverbialClauseofConditionif引导的条件状语从句-----------复习课RevisionAdverbialClauseofCo33Ifyouarehappy,whatwillyoudo?

IfIamhappy,Iwillsmile.Ifyouarehappy,whatwillyo34Ifyoubecomesad,whatwillyoudo?IfIbecomesad,Iwillcry.Ifyoubecomesad,whatwilly35Sheisdoingherhomework.Ifyouarehard-working,youwillgetgoodgrades.Shegetsgoodgrades.Sheisdoingherhomework.Ify36Ifyouplaycomputergamesonweekdays

,you’llbeverytiredinclassyourparentswillbesad.youwon’tgetgoodgrades.youreyeswillbepoorIfyouplaycomputergameson37Shewillbelate.Ifshe_____toschool,she________late.Sheisgoingtowalktoschool.walkswillbeLead-inShewillbelate.Ifshe_____381)条件状语从句通常由if或unless(=ifnot)引导，从句中常用一般时代替将来时，即if或unless后的句子谓语用一般现在时。但是，主句则通常用将来时，情态动词或祈使句。

时态－－主将从现主句一般将来时，从句一般现在时1)条件状语从句通常由if或unless(=ifnot)391.

如果主句是一般将来时，从句则用一般现在时。

Ifitrains（从句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（从句）.2.如果主句含有must,may,can等情态动词，从句也要用一般现在时。

Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，从句同样要用一般现在时。

Don’tgoandplayfootballifyoudon’tfinishyourhomework.

PleasecallmeifhecomesnextSunday.if条件状语从句结构及时态Revisionif条件状语从句结构及时态Revision40

If引导条状语从句时，从句中用一般现在时代替一般将来时。1.Ifhe______(go)tothemovies,hewon’tfinishhiswork.goes2.IfI________(become)adoctor,Icanhelpothers.become3.Ifwe_______(have)time,wewillgototheparktomorrow.have4.如果你去，我也去。Ifyougo,Iwillgo.5.如果明天下雨，请带雨衣。raincoatPleasetakearaincoatifitrains.excellentIf引导条状语从句时，从句中用一般现在41Ifyouarefreethisweekend,whatwillyoudo?IfIamfree,…sleepwatchTVplaycomputergamespracticeIfyouarefreethisweekend,I42Ifyouwanttogetgoodmarks,

dowhat?Don’tdowhat?Ifyouwanttogetgoodmarks,__________.Ifyouwanttogetgoodmarks,don’t__________.studyhardlistentoteacherscarefully.dohomeworkbyyourself.

copyyourhomework.talkintheclasscheatintheexamsIfyouwanttogetgoodmarks,43Ifyouhaveenoughpocketmoney,whatwillyoubuy?IfIhaveenoughpocketmoney,I____________________.Ifyouhaveenoughpocketmone44IfyouinviteforeignerstoChina,wherewillyougo?Iwillgoto_________,ifIinviteforeignerstoChina.MountTaiWestlakeHainanIfyouinviteforeignerstoCh45If条件句的替代形式：

（1）祈使句+and/or+陈述句（谓语动词通常用将来时态）。其中，and表示句意顺承；or表示转折，意为“否则”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.verygoodIf条件句的替代形式：verygood46（2）用介词with,without的替代形式：

e.g.Ifthereisnowater,thefishmaydie.

=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.

=Withyourhelp,I’llfinishmytaskontime.（2）用介词with,without的替代形式：47Activity1Rewritethesentenceswithif:Listeninclass,oryouwon’tunderstandwhattodo.Ifyoudon’t

listeninclass,youwon’tunderstandwhattodo.1)Eatbreakfast,oryou’llgethungryatschool.2)Hurryup!We’llbelate!Ifyoudon’teatbreakfast,you’llgethungryatschool.Ifyoudon’thurryup,we’llbelate.Activity1Rewritethesenten48Activity2.Completethesentences—Iwanttogethighscores.—If__________________________(workhard/dowell)youworkhard,youwilldowell.1.-howcanIremembermyfriends’birthdays?-If_______________________________________(keepanoteinyourdiary/notforget).2.-It’slate,butIdon’twanttogotosleep.-If_______________________________________(notgetenoughsleep/feeltiredatschool).youkeepanoteinyourdiary,youwon’tforget.youdon’tgetenoughsleep,you’llfeeltiredatschool.Activity2.Completethesentenc49if引导的条件状语从句和if引导的宾语从句的区分:If在宾语从句中翻译为“是否”If在条件状语从句中翻译为“如果”I’llgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.if在句中的含义不同if引导的条件状语从句和if引导的宾语从句的区分:If502.if在从句中的位置不同If引导的宾语从句放在主句之后；而if引导的状语从句可放在主句之前也可放在主句之后=Ifitdoesn’train,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesn’train.Idon’tknowifthetrainhasarrived.

If引导的条件状语从句放于句首时多用逗号隔开；而if引导的宾语从句则不能。2.if在从句中的位置不同If引导的宾语从句放在主句之513.时态要求上有区别If引导条件状语从句的时态为一般现在时记住“主将从现”

1.Iwanttoknowifthere

asportsmeetingnextmonth.doesn’trainwillbe2.Ifit

doesn’train,we’llgooutIf引导的宾语从句的时态由主句及本身时态决定；3.时态要求上有区别If引导条件状语从句的时态为一般现在52找出下列句子中哪些是if条件状语从句，哪些是if宾语从句1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Ican’tguessifshewillbeangry.4.Ifwehelpeachother,wewillgetgoodresults.找出下列句子中哪些是if条件状语从句，哪些是if宾语从句1.53If引导的条件状语从句的练习1

IfI_______________(notunderstand）,Iwillaskmyteacherforhelp.IfI__________(copy)yourhomework,Iwillcheatmyself.3Ifshe_______________(notget)upearly,she’llmisstheearlybus.4Ifyourmother_______(buy)thebookforyou,itwillbegoodforyourstudy.

don’tunderstand

copy

doesn’tget

buysIf引导的条件状语从句的练习1IfI________545.Ifyou____________(notwork)hard,you_________(notpass)theexam.6.Ifyourbrother____________(break)thewindow,hewillfeelverysorryforthat.7.Ifthecomputer

(notwork),menditplease.don’tworkwon’tpassbreaksdoesn’twork5.Ifyou____________(notwor558.Ifshe_______(notbe)interestedinmath,shewillfinditveryboring.9.Ifyou_________(get)highscores,yourparentswillbeproudofyou.10.Ifyou_________(be)happy,wewillbehappy.isn’tgetare

8.Ifshe_______(notbe)inte56.Iwanttoknowifhe_______(come)tomorrow,ifhe_______(come),I__________(give)themessagetohim.

eswillcom57summaryif的用法2.引导条件状语从句：译为“如果，假如”(1)if从句+祈使句(2)if从句+主句（一般将来时）(3)if从句+主句（含有情态动词）

1.引导宾语从句：译为“是否”，表示不确定的概念。Idon’tknowifyourfathercancometogether.Canyoutellmeifmissyourparents?summaryif的用法2.引导条件状语从句：译为“如果，假581.Ifyou_____totheparty,you’llhaveagreattime.A.willgo

B.went

C.go

D.going2．I____hertheanswerifshe____me.A.cantell,w