高中英语必修7条件状语从句

IfIgetuplate,Iwillbelateforschool.IfIdon’tfinishmyhomework,Iwon’tgotobed.由if引导的从句叫条件状语从句，if意为“如果”

若主句是一般将来时，从句要用一般现在时。Ifyoujointheband,youwillbefamous.=Youwillbefamousifyoujointheband.Grammar条件状语从句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（将来时）从句（一般现在时）A：actionshavingresultsthatwillprobablyhappen(2)主句为祈使句或情态动词形式Ifsb

doessth,pleasedosthIfsb

doessth,sb

may(情态动词)dosthIfsentences

Ifsb

doessth,sb/sth

doessth=sb/sth

dosthifsb

doessth主句（一般现在时）

从句（一般现在时）B：actionshavingresultsthatwillcertainlyhappen相当于when从句Can‘if’bereplacedbyotherwords?主语的行为将导致某种必然发生的结果时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【语法点拨】一、if引导的条件状语从句条件状语从句在复合句中表示主句动作发生的条件。if意为“如果；假如”，表示在某种条件下某事很可能发生。1．if引导的条件状语从句可以位于主句之前，也可以位于主句之后。如果从句在前，从句与主句之间要用逗号隔开。如：Ifitdoesnotraintomorrow，wewillgohiking．如果明天不下雨，我们就去远足。Youwillgetgoodgradesifyoustudyhard．如果你努力学习，就会取得好成绩。2．在if引导的条件状语从句中，主句中的动词常用一般将来时，从句中的动词用一般现在时。如：Ifyouaskhim，hewillhelpyou．如果你请他，他会帮你的。TheyaregoingtohaveapicniciftheyarefreenextSaturday．如果下周六有空，他们就去野餐。3．在if引导的条件状语从句中，主句也可含有情态动词或是祈使句，但无论主句用一般将来时、情态动词还是祈使句，从句均用一般现在时。如：Ifitisfinetomorrow，wecangoandflythekite．如果明天天气好，我们可以去放风筝。Don’tmisstheprogrammeifyoulikemusic．如果你喜欢音乐，不要错过这个节目。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引导的条件状语从旬1．unless意为“除非，如果不”，相当于if…not。如：Youwillbelateunlessyouleaveatonce,如果你不马上走，你将迟到了。一Ifyoudonotleaveatonce，youwillbelate．2．在unless引导的条件状语从句中，主句中的动词常用一般将来时，从句中的动词用一般现在时。如：Unlessitrains·thegamewillbeplayed．除非下雨，否则比赛将照常进行。3．同if引导的条件状语从句一样，在unless引导的条件状语从句中，主句也可以含有情态动词或是祈使句。如：Hecannotseeclearlyunlesshewearsglasses．他不戴眼镜就看不清楚。Don’ttouchthemachineunlesstheteacherallowsyouto．没有老师的允许，不要乱动机器。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没准时来，我们就不等他先走。2.如果没有你的帮助，我将不能完成这份工作。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

用括号内所给词的正确形式填空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请告诉我们他明天是否会来。如果他明天来的话请告诉我们。comesstudieswillbe14.Idon’tknowifit_______tomorrow.Ifit____,Iwon’tgoshopping.(rain)willrainrains表是否，用将来时态表如果，用一般现在时态(P89