if條件狀語(yǔ)從句課件

RevisionAdverbialClauseofConditionif引導(dǎo)的條件狀語(yǔ)從句-----------復(fù)習(xí)課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)條件狀語(yǔ)從句通常由if或unless(=ifnot)引導(dǎo)，從句中常用一般時(shí)代替將來(lái)時(shí)，即if或unless后的句子謂語(yǔ)用一般現(xiàn)在時(shí)。但是，主句則通常用將來(lái)時(shí)，情態(tài)動(dòng)詞或祈使句。

時(shí)態(tài)－－主將從現(xiàn)主句一般將來(lái)時(shí)，從句一般現(xiàn)在時(shí)1)條件狀語(yǔ)從句通常由if或unless(=ifnot)71.

如果主句是一般將來(lái)時(shí)，從句則用一般現(xiàn)在時(shí)。

Ifitrains（從句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（從句）.2.如果主句含有must,may,can等情態(tài)動(dòng)詞，從句也要用一般現(xiàn)在時(shí)。

Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，從句同樣要用一般現(xiàn)在時(shí)。

Don’tgoandplayfootballifyoudon’tfinishyourhomework.

PleasecallmeifhecomesnextSunday.if條件狀語(yǔ)從句結(jié)構(gòu)及時(shí)態(tài)Revisionif條件狀語(yǔ)從句結(jié)構(gòu)及時(shí)態(tài)Revision8

If引導(dǎo)條狀語(yǔ)從句時(shí)，從句中用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)。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，請(qǐng)帶雨衣。raincoatPleasetakearaincoatifitrains.excellentIf引導(dǎo)條狀語(yǔ)從句時(shí)，從句中用一般現(xiàn)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條件句的替代形式：

（1）祈使句+and/or+陳述句（謂語(yǔ)動(dòng)詞通常用將來(lái)時(shí)態(tài)）。其中，and表示句意順承；or表示轉(zhuǎn)折，意為“否則”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.verygoodIf條件句的替代形式：verygood14（2）用介詞with,without的替代形式：

e.g.Ifthereisnowater,thefishmaydie.

=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.

=Withyourhelp,I’llfinishmytaskontime.（2）用介詞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引導(dǎo)的條件狀語(yǔ)從句和if引導(dǎo)的賓語(yǔ)從句的區(qū)分:If在賓語(yǔ)從句中翻譯為“是否”If在條件狀語(yǔ)從句中翻譯為“如果”I’llgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.if在句中的含義不同if引導(dǎo)的條件狀語(yǔ)從句和if引導(dǎo)的賓語(yǔ)從句的區(qū)分:If182.if在從句中的位置不同If引導(dǎo)的賓語(yǔ)從句放在主句之后；而if引導(dǎo)的狀語(yǔ)從句可放在主句之前也可放在主句之后=Ifitdoesn’train,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesn’train.Idon’tknowifthetrainhasarrived.

If引導(dǎo)的條件狀語(yǔ)從句放于句首時(shí)多用逗號(hào)隔開(kāi)；而if引導(dǎo)的賓語(yǔ)從句則不能。2.if在從句中的位置不同If引導(dǎo)的賓語(yǔ)從句放在主句之193.時(shí)態(tài)要求上有區(qū)別If引導(dǎo)條件狀語(yǔ)從句的時(shí)態(tài)為一般現(xiàn)在時(shí)記住“主將從現(xiàn)”

1.Iwanttoknowifthere

asportsmeetingnextmonth.doesn’trainwillbe2.Ifit

doesn’train,we’llgooutIf引導(dǎo)的賓語(yǔ)從句的時(shí)態(tài)由主句及本身時(shí)態(tài)決定；3.時(shí)態(tài)要求上有區(qū)別If引導(dǎo)條件狀語(yǔ)從句的時(shí)態(tài)為一般現(xiàn)在20找出下列句子中哪些是if條件狀語(yǔ)從句，哪些是if賓語(yǔ)從句1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Ican’tguessifshewillbeangry.4.Ifwehelpeachother,wewillgetgoodresults.找出下列句子中哪些是if條件狀語(yǔ)從句，哪些是if賓語(yǔ)從句1.21If引導(dǎo)的條件狀語(yǔ)從句的練習(xí)1

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

don’tunderstand

copy

doesn’tget

buysIf引導(dǎo)的條件狀語(yǔ)從句的練習(xí)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.引導(dǎo)條件狀語(yǔ)從句：譯為“如果，假如”(1)if從句+祈使句(2)if從句+主句（一般將來(lái)時(shí)）(3)if從句+主句（含有情態(tài)動(dòng)詞）

1.引導(dǎo)賓語(yǔ)從句：譯為“是否”，表示不確定的概念。Idon’tknowifyourfathercancometogether.Canyoutellmeifmissyourparents?summaryif的用法2.引導(dǎo)條件狀語(yǔ)從句：譯為“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引導(dǎo)的非真實(shí)性條件狀語(yǔ)從句（虛擬語(yǔ)氣）

(A)與現(xiàn)實(shí)事實(shí)相反

主：過(guò)去將來(lái)時(shí)

從：過(guò)去時(shí)

If

they

were

here

,they

would

help

you.

(B)與過(guò)去事實(shí)相反

主：should/would

+have

+v.(p.p.)

從：had+v.(p.p.)

E.

If

he

had

worked

harder

,he

would

have

succeeded.If引導(dǎo)的非真實(shí)性條件狀語(yǔ)從句（虛擬語(yǔ)氣）

(A)與現(xiàn)實(shí)事29BYTHETIMEbythetime+一般過(guò)去時(shí)，從句過(guò)去完成時(shí)bythetime+一般現(xiàn)在時(shí)，從句現(xiàn)在完成時(shí)BYTHETIMEbythetime+一般過(guò)去時(shí)，30nerd

n.令人厭煩的人；愚蠢的人；落伍的人；電腦迷shrugv.聳肩（表示不知道或不在乎）shrugsthoff/aside不把…當(dāng)回事；對(duì)…滿不在乎；對(duì)…不予理睬dirtn.泥土;污垢，污泥;下流想法;惡意中傷的話Hisclotheswerecoveredindirt.他的衣服沾滿了污垢。nerd

n.令人厭煩的人；愚蠢的人；落伍的人；電腦迷shr31handn.手;協(xié)助，幫助;（工具等的）把，柄;掌管vt.傳遞，交給;攙扶;支持Severalofhiscolleagueshadahandinhisdownfall.他的幾位同事對(duì)他的下臺(tái)起了作用。gratituden.謝意;感激，感謝;感激的樣子;恩義Hesmiledatthemwithgratitude.他向他們笑了笑表示謝意hand32RevisionAdverbialClauseofConditionif引導(dǎo)的條件狀語(yǔ)從句-----------復(fù)習(xí)課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)條件狀語(yǔ)從句通常由if或unless(=ifnot)引導(dǎo)，從句中常用一般時(shí)代替將來(lái)時(shí)，即if或unless后的句子謂語(yǔ)用一般現(xiàn)在時(shí)。但是，主句則通常用將來(lái)時(shí)，情態(tài)動(dòng)詞或祈使句。

時(shí)態(tài)－－主將從現(xiàn)主句一般將來(lái)時(shí)，從句一般現(xiàn)在時(shí)1)條件狀語(yǔ)從句通常由if或unless(=ifnot)391.

如果主句是一般將來(lái)時(shí)，從句則用一般現(xiàn)在時(shí)。

Ifitrains（從句），Iwillstayathome.I’llgowithyouifyoudon’twanttogoalone（從句）.2.如果主句含有must,may,can等情態(tài)動(dòng)詞，從句也要用一般現(xiàn)在時(shí)。

Ifyoudrivetoofast,youmayhaveanaccident.Youmuststopifthetrafficisred.3.如果主句是祈使句，從句同樣要用一般現(xiàn)在時(shí)。

Don’tgoandplayfootballifyoudon’tfinishyourhomework.

PleasecallmeifhecomesnextSunday.if條件狀語(yǔ)從句結(jié)構(gòu)及時(shí)態(tài)Revisionif條件狀語(yǔ)從句結(jié)構(gòu)及時(shí)態(tài)Revision40

If引導(dǎo)條狀語(yǔ)從句時(shí)，從句中用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)。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，請(qǐng)帶雨衣。raincoatPleasetakearaincoatifitrains.excellentIf引導(dǎo)條狀語(yǔ)從句時(shí)，從句中用一般現(xiàn)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條件句的替代形式：

（1）祈使句+and/or+陳述句（謂語(yǔ)動(dòng)詞通常用將來(lái)時(shí)態(tài)）。其中，and表示句意順承；or表示轉(zhuǎn)折，意為“否則”。e.g.Ifyouworkhard,you’llpasstheexameasily.=Workhard,andyou’llpasstheexameasily.Ifyoudon’tworkhard,you’llfallbehindothers.=Workhard,oryou’llfallbehindothers.verygoodIf條件句的替代形式：verygood46（2）用介詞with,without的替代形式：

e.g.Ifthereisnowater,thefishmaydie.

=Fishmaydiewithoutwater.Ifyouhelpme,I’llfinishmytaskontime.

=Withyourhelp,I’llfinishmytaskontime.（2）用介詞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引導(dǎo)的條件狀語(yǔ)從句和if引導(dǎo)的賓語(yǔ)從句的區(qū)分:If在賓語(yǔ)從句中翻譯為“是否”If在條件狀語(yǔ)從句中翻譯為“如果”I’llgotoseeyouifIamfreenextweek.Iwanttoknowifheisateacher.whether1.if在句中的含義不同if引導(dǎo)的條件狀語(yǔ)從句和if引導(dǎo)的賓語(yǔ)從句的區(qū)分:If502.if在從句中的位置不同If引導(dǎo)的賓語(yǔ)從句放在主句之后；而if引導(dǎo)的狀語(yǔ)從句可放在主句之前也可放在主句之后=Ifitdoesn’train,Iwillgoouttomorrow.Iwillgoouttomorrowifitdoesn’train.Idon’tknowifthetrainhasarrived.

If引導(dǎo)的條件狀語(yǔ)從句放于句首時(shí)多用逗號(hào)隔開(kāi)；而if引導(dǎo)的賓語(yǔ)從句則不能。2.if在從句中的位置不同If引導(dǎo)的賓語(yǔ)從句放在主句之513.時(shí)態(tài)要求上有區(qū)別If引導(dǎo)條件狀語(yǔ)從句的時(shí)態(tài)為一般現(xiàn)在時(shí)記住“主將從現(xiàn)”

1.Iwanttoknowifthere

asportsmeetingnextmonth.doesn’trainwillbe2.Ifit

doesn’train,we’llgooutIf引導(dǎo)的賓語(yǔ)從句的時(shí)態(tài)由主句及本身時(shí)態(tài)決定；3.時(shí)態(tài)要求上有區(qū)別If引導(dǎo)條件狀語(yǔ)從句的時(shí)態(tài)為一般現(xiàn)在52找出下列句子中哪些是if條件狀語(yǔ)從句，哪些是if賓語(yǔ)從句1.Canyoutellmeifshecancometothemeeting?2.Shewillnotgothereifitisrainytomorrow.3.Ican’tguessifshewillbeangry.4.Ifwehelpeachother,wewillgetgoodresults.找出下列句子中哪些是if條件狀語(yǔ)從句，哪些是if賓語(yǔ)從句1.53If引導(dǎo)的條件狀語(yǔ)從句的練習(xí)1

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

don’tunderstand

copy

doesn’tget

buysIf引導(dǎo)的條件狀語(yǔ)從句的練習(xí)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.引導(dǎo)條件狀語(yǔ)從句：譯為“如果，假如”(1)if從句+祈使句(2)if從句+主句（一般將來(lái)時(shí)）(3)if從句+主句（含有情態(tài)動(dòng)詞）

1.引導(dǎo)賓語(yǔ)從句：譯為“是否”，表示不確定的概念。Idon’tknowifyourfathercancometogether.Canyoutellmeifmissyourparents?summaryif的用法2.引導(dǎo)條件狀語(yǔ)從句：譯為“如果，假581.Ifyou_____totheparty,you’llhaveagreattime.A.willgo

B.went

C.go

D.going2．I____hertheanswerifshe____me.A.cantell,w