高中英語(yǔ)必修7條件狀語(yǔ)從句

IfIgetuplate,Iwillbelateforschool.IfIdon’tfinishmyhomework,Iwon’tgotobed.由if引導(dǎo)的從句叫條件狀語(yǔ)從句，if意為“如果”

若主句是一般將來(lái)時(shí)，從句要用一般現(xiàn)在時(shí)。Ifyoujointheband,youwillbefamous.=Youwillbefamousifyoujointheband.Grammar條件狀語(yǔ)從句If

thetelephonerings,Iwill

answerit.If

yougetuplate,youwillbelateforschool.LookandsayIf

youfeelhungry,you

should

eatsomething.Ifyoufeeltired,you

must

havearest.If

youareill,you

must

gotoseeadoctor.If

youareridingabikeinthestreet,you

must

beverycareful.PairworkIfyoustayathome,youwillbesorry.Ifyouworkuntilnight,youwillbetired.Ifwebreakthetrafficrules,wewillgetafineandevenbeindanger.Ifitisfinetomorrow,wewillgoonaschooltrip.

wewillclimbmountains.IwillgotoBeijingUniversity.IfIstudyhard,IfIhaveenoughmoney,Iwilltravelaroundtheworld.Ifyouhavearobot,whatwillyoudo?playgamescleanmybedroomdohomeworkformeIwillletit…Example:

IfIhavearobot,Ifsentences

(1)Ifsb

doessth,sb

willdosth=sb

willdosth

ifsb

doessth

主句（將來(lái)時(shí)）從句（一般現(xiàn)在時(shí)）A：actionshavingresultsthatwillprobablyhappen(2)主句為祈使句或情態(tài)動(dòng)詞形式Ifsb

doessth,pleasedosthIfsb

doessth,sb

may(情態(tài)動(dòng)詞)dosthIfsentences

Ifsb

doessth,sb/sth

doessth=sb/sth

dosthifsb

doessth主句（一般現(xiàn)在時(shí)）

從句（一般現(xiàn)在時(shí)）B：actionshavingresultsthatwillcertainlyhappen相當(dāng)于when從句Can‘if’bereplacedbyotherwords?主語(yǔ)的行為將導(dǎo)致某種必然發(fā)生的結(jié)果時(shí)1.IfI___(go,willgo)totheReadingClubthisafternoon,I____________(donothave,maynothave)anytimetowatchTV.2.IfSimon____(gets,willget)homelate,he________(misses,willmiss)hisfavouritecartoon.gomaynothavegetswillmissA1.Millieisthinkingaboutherself,herfriendsandTVprogrammes.Completethesentenceswiththecorrectformsoftheverbsinbrackets.3.IfAmy________(completes,willcomplete)allherhomeworkquickly,she________(watches,willwatch)thechatshow.completeswillwatch4.IfDaniel_____(takes,willtake)partinthegameshow,he_________(wins,mightwin)aprize.takesmightwinP84PracticeNewKnowledge5.IfSandy______(finds,willfind)aprogrammeinteresting,she_____________(introduces,willintroduce)ittous.findswillintroduceattackcatchhuntliveprotectwalkDad:

Whatwillabeardoifit’sindanger?Millie:Ifabear(1)____________,it(2)___________people.Dad:

Whatwillapolarbeardoifit’shungry?Millie:Ifapolarbear(3)_________,it(4)_________fishfromthewater.isindangerwillattackishungrywillcatchNewKnowledgeDad:Whatwillelephantsdoifthey’rethirsty?Millie:Ifelephants(5)___________,they(6)__________untiltheyfindariver.Dad:Whatwilltigersdoiftheyliveinthewild?Millie:Tigers(7)_________fortheirownfoodifthey(8)______________.

arethirstywillwalkwillhuntliveinthewildNewKnowledgeDad:Whatwilltigersdoiftheyhavebabies?Millie:Tigers(9)________asafamilyifthey(10)____________.Dad:Whatwillmalewolvesdoifthere’sdanger?Millie:Malewolves(11)____________theirfamiliesifthere(12)__________.willlivehavebabieswillprotectisdangerliveasafamilyNewKnowledgeGrammarU6【語(yǔ)法點(diǎn)撥】一、if引導(dǎo)的條件狀語(yǔ)從句條件狀語(yǔ)從句在復(fù)合句中表示主句動(dòng)作發(fā)生的條件。if意為“如果；假如”，表示在某種條件下某事很可能發(fā)生。1．if引導(dǎo)的條件狀語(yǔ)從句可以位于主句之前，也可以位于主句之后。如果從句在前，從句與主句之間要用逗號(hào)隔開。如：Ifitdoesnotraintomorrow，wewillgohiking．如果明天不下雨，我們就去遠(yuǎn)足。Youwillgetgoodgradesifyoustudyhard．如果你努力學(xué)習(xí)，就會(huì)取得好成績(jī)。2．在if引導(dǎo)的條件狀語(yǔ)從句中，主句中的動(dòng)詞常用一般將來(lái)時(shí)，從句中的動(dòng)詞用一般現(xiàn)在時(shí)。如：Ifyouaskhim，hewillhelpyou．如果你請(qǐng)他，他會(huì)幫你的。TheyaregoingtohaveapicniciftheyarefreenextSaturday．如果下周六有空，他們就去野餐。3．在if引導(dǎo)的條件狀語(yǔ)從句中，主句也可含有情態(tài)動(dòng)詞或是祈使句，但無(wú)論主句用一般將來(lái)時(shí)、情態(tài)動(dòng)詞還是祈使句，從句均用一般現(xiàn)在時(shí)。如：Ifitisfinetomorrow，wecangoandflythekite．如果明天天氣好，我們可以去放風(fēng)箏。Don’tmisstheprogrammeifyoulikemusic．如果你喜歡音樂，不要錯(cuò)過這個(gè)節(jié)目。Exercises:changethefollowingsentencesintoifsentences3.Getupearly,notbelate4.Takeafishoutofwater,die5.Heatmetal,meltIfyougetupearly,youwon’tbelate.Ifyouheatmetal,itmeltsreturnscallbuypasses1.Ifshe______(return)fromParis,please____(call)me.2.Ifhe______(pass)thetest，wemay____(buy)acar.Ifyoutakeafishoutofwater,itdies.IwillgetupatnoonifIdon’thavetowork.IwillgetupatnoonunlessIhavetowork.Hewillplaycomputergamesifhedoesn’t

havehomework.Hewillplaycomputergamesunlesshehashomework.Mymotherwilllistentomusicifshedoesn’thavehouseworktodo.Mymotherwilllistentomusicunlessshehashouseworktodo.TalkaboutpicturesLeadinYouwillfailtheexamifyoudon’tprepareforit.Youwillfailtheexamunlessyouprepareforit.Shewon’tknowtheword’smeaningunlessshelooksitupinthedictionary.Ifshedoesn’tlookupthewordinthedictionary,shewon’tknowitsmeaning.TalkaboutpicturesLeadinC：Unless：

sbwilldosth

unlesssbdoessth

ifsbdoesnotdosthEg:Youwillbelateforschoolyounow.Youwillbelateforschoolyounow.unlessleavedon’tleaveif二、unless引導(dǎo)的條件狀語(yǔ)從旬1．unless意為“除非，如果不”，相當(dāng)于if…not。如：Youwillbelateunlessyouleaveatonce,如果你不馬上走，你將遲到了。一Ifyoudonotleaveatonce，youwillbelate．2．在unless引導(dǎo)的條件狀語(yǔ)從句中，主句中的動(dòng)詞常用一般將來(lái)時(shí)，從句中的動(dòng)詞用一般現(xiàn)在時(shí)。如：Unlessitrains·thegamewillbeplayed．除非下雨，否則比賽將照常進(jìn)行。3．同if引導(dǎo)的條件狀語(yǔ)從句一樣，在unless引導(dǎo)的條件狀語(yǔ)從句中，主句也可以含有情態(tài)動(dòng)詞或是祈使句。如：Hecannotseeclearlyunlesshewearsglasses．他不戴眼鏡就看不清楚。Don’ttouchthemachineunlesstheteacherallowsyouto．沒有老師的允許，不要亂動(dòng)機(jī)器。1.Unlesstheweatherreportsaysitisgoingtorain,______2.Wewillarriveatthestudioaround9:30a.m.,_______3.Unlessyoualreadyknowthestudioverywell,______4.Youwillbuyyourlunchattherestaurantsinthestudio,______5.Unlessyouaretired,______6.YouwillhaveachancetoseehowaTVprogrammeisrecorded,_______cdⅠ.PracticeNewKnowledgefabea.unlessyoutakeyourownfoodwithyou.b.youwillnotneedtotaketheminibusinthestudio.c.youwillnothavetotakeanumbrellawithyou.d.unlessthetrafficisveryheavy.e.unlessyouhavelittleinterestinit.f.youwilltravelarounditwithatourguide.如果Max沒準(zhǔn)時(shí)來(lái)，我們就不等他先走。2.如果沒有你的幫助，我將不能完成這份工作。IfMaxdoesn’tcomeontime,wewillleavewithouthim.UnlessMaxcomesontime,wewillleavewithouthim.Iwon’tfinishthisworkifyoudon’thelpme.Iwon’tfinishthisworkunlessyouhelpme.TwoTranslationsNewKnowledge1.Ifhe

hard,hewillgetgoodgrades.

A.study

B.studies

C.willstudy

D.studied2.IwanttoknowifMary

tothepartytomorrow.A.go

B.went

C.willgo

D.goes

3.Everyonemustdressup.Ifyou

,theywon’tletyouin.A.don’t

B.won’t

C.can’t

D.mustn’t4.MarywillgotoSanyaifshe

afive-daytrip.A.have

B.had

C.willhave

D.has5.Ifhecomeslate,

hewillmissthetrain.A.and

B.so

C./

D.orBCADCMultipleChoiceNewKnowledge1.Iwillsendyouane-mailassoonasI_______inCanada.A.arriveB.arrivedC.amarrivingD.willarrive2.Ifthere_____nobuyingandsellingofanimals,there______nokillinginnature.A.is;willbeB.willbe;willbeC.is;isD.willbe;is3.

I’m

waiting

for

my

friend.____,

I'll

go

shopping

alone.

A.

If

she

comes

B.

If

she

won't

come

C.

If

she

doesn't

come

4.

You

can’t

watch

TV

______

you

finish

your

homework.

A.

unless

B.

if

C.

while

D.

as

5.The

students

______

have

a

sports

meeting

this

weekend

if

it

___.

A.

won’t;

rains

B.

will;

rains

C.

won’t;

will

rain

D.

are

going

to;

is

going

to

rain

6.

I

don't

know

if

she

______

to

my

birthday

party

tomorrow.

If

she

______,

I'll

be

very

happy.

A.

comes;

comes

B.

will

come;

comes

C.

comes;

will

come

7.

——When

will

you

come

to

Daqing?

—

I

will

call

you

_____I

arrive.A.

till

B.

while

C.

as

quickly

as

D.

as

soon

as

8.

I’ll

give

it

to

Jim

as

soon

as

I

_______

him

tomorrow.

A.

saw

B.

will

see

C.

see

D.

have

seen

beindangerliveinthewildliveasafamilyrealizeyourdreamweatherreporthaveachancetodosth.takeyourownfoodwithyouhavelittleinterestinsth.句型:Ifyouenjoysolvingmysteries,youmightlikethisfilm.Unlessyoutryyourbest,youwillnotrealizeyourdream.YouwillhaveachancetoseehowaTVprogrammeisrecordedunlessyouhavelittleinterestinit.Morepractice1.Ifyou______(drop)aglass,it______(break).2.He______(fail)intheexamifhe______(notstudy)hard.3.Unlessyou______(leave)now,you______(be)late.4.We______(have)abarbecueunlessit______(rain).5.Ifyou____(cool)water,it_____(turn)intoice.6.Hurryup,oryouwillmissthebus.___youdon’thurryup,you____catchtheearlybus.7.Studyhard,oryou’llmissfallbehind.______youstudyhard,you______fallbehind.8.Ifyoudon’tputonyourscarf,you’llcatchcold.Putonyourscarf,_____you’llcatchcold.9.Theinsurancecompanywouldpayhim2millionyuanifthevasewasstolen.Theinsurancecompany_____payhim2millionyuan_____thevasewasstolen.10.Idon’tknowifit_______tomorrow.Ifit____,Iwon’tgoshopping.(rain)dropbreakswillfaildoesn’tstudyleavewillbewillhaverainscoolturnsIfwon’tUnlesswillorwon’tunlesswillrainrainsHaveatry

用括號(hào)內(nèi)所給詞的正確形式填空1.I’msureifhe_____(go)totheparty,he________(have)agreattime.2.Iftherain_______(stop)tonight,wewillgotothecinema.3.I’llbuyacomputerifI______(have)enoughmoney.4.You_________(notget)nervousifyou_____(do)enoughexercise.5.Ifshe____(be)kindtome,I__________(notargue)withher.6.Iwanttoknowifhe_________(come)tomorrow,ifhe_______(come),I__________(give)themassagetohim.7.Ifyou_____(pay)moreattentiontothat,he_________(notget)injured.goeswillhavestopshavewon’tgetdoiswon’targuecomescomeswillgivepaywon’tget8.MrLiwillbemadifwe_______(break)therules.9.Ifit_____(be)cloudy,they_______(notgo)therebyair.10.Pleaseletusknowifhe________(arrive)tomorrow.Pleaseletusknowifhe_________(arrive)tomorrow.

11.ShallIsay“Hello”whentheforeigner______(come)intotheclassroom?12.He’llgetbettergradesifhe_________(study)hard.13.Ifyouworkreallyhard,you_______(be)famousandrich.breakiswon’tgowillarrivearrives請(qǐng)告訴我們他明天是否會(huì)來(lái)。如果他明天來(lái)的話請(qǐng)告訴我們。comesstudieswillbe14.Idon’tknowifit_______tomorrow.Ifit____,Iwon’tgoshopping.(rain)willrainrains表是否，用將來(lái)時(shí)態(tài)表如果，用一般現(xiàn)在時(shí)態(tài)(P89