常见的条件状语从句公开课课件PPT资料.pptx
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,IfIgetupat7:
00,Iwillbelate.,IfIamlate,theteacherwillbeangrywithme.,Iftheteacherisangrywithme,Iwillbesad.,If引导条件状语从句,一,定义:
if“如果,假如”它引导的句子表示某事发生所需的条件,即“在条件下,某事才能发生”,在句子中充当状语,因此称之为条件状语从句。
Ifyougetuplate,youwillbelateforschool.,Lookandsay,语法:
例句IfIhaveenoughmoney,Iwilltravelaroundtheworld:
二.if引导的条件状语从句位置,从句,主句,IwilltravelaroundtheworldifIhaveenoughmoney.,原句可改为:
if引导的条件状语从句既可以放在句子前,也可以放在句子后。
从句位于主句之前时,常用逗号将其与主句隔开。
结构:
_ifImill.,Iwillseeadoctor,Lookandsay,IfImlate,_.,Iwillbepunished.,位置:
从句可放在主句之前或之后,但是放在主句之前须有逗号隔开,例如:
Wewillgototheparkifit__(rain)tomorrow.,Grammar,三,含if条件状语从句的主从复合句的时态,1.if条件状语从句中,主句用一般将来时,从句用_表示将来_原则。
doesnt,主将从现,rain,一般现在时,Itisgoingtoraintomorrow.,Iwillstayathome.,Ifit_tomorrow,I__athome.,rains,will,stay,Hewontstudyhard.,Hewillfailintheexam.,“Ifhe_studyhard.He__intheexam.”,doesnt,will,fail,IfIhavemuchmoney,Iwill,travelallovertheworld.,buylotsofdeliciousfood.,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_。
例如:
Youmuststopifthetrafficlight_(be)red.,is,一般现在时,“主情从现”,Ifyoufeelhungry,youshouldeatsomething.,Ifyoufeeltired,youmusthavearest.,例如:
DontwaitformeifI_(be)late.,3.if条件状语从句中,主句是祈使句,从句用_表示将来。
_原则。
am,主祈从现,一般现在时,if引导的条件状语从句时态,主将从现,祈使句,情态动词,IwillsingasongifIamhappy.,主句,从句,Dontcrosstheroadifthelightisred,Youmuststopifthetrafficlightisred.,2.Ifit_(be)coldtomorrow,Iwillwearmysweater.,3.Hecangohomeifhe_(finish)hishomework.,finishes,1.Putupyourhandsifyou_(have)anyquestions.,have,is,趁热打铁,注意事项1.在if引导的条件状语从句中,当主句是一般将来时时,不能够使用begoingto结构,而要用will。
例如:
IllhelpyouwithyourEnglishifIamfreetomorrow.如果明天我有空,我会帮你学英语。
2.在if引导的条件状语从句中不能够使用some,而要用any。
Ifyouhaveanyquestionstoask,pleasecometomyoffice.如果你有问题要问的话,请到我办公室来。
四、if的两面性if引导条件状语从句时意为“如果”,如果引导宾语从句则意为“是否”,放在谓语动词之后。
请比较:
1)Wewillgooutifitisfinetomorrow.2)Idontknowifthetrainhasarrived.,Ajoke,Amanlikedagirlverymuchandaskedifthegirlcouldmarryhim.Butthegirldidntagree.Shesaid,“ifthereisonlyonemanleft,Iwillmarryyou.”,Part1:
If的用法,1.Iwanttoknowifhewillgotoaparkwithus.,2.Wewillhaveapicnicifitdoesntrain.,3.Canyoutellmeiftherewillbeaconcerttomorrow?
4.Ifyoufeeltired,youmusthavearest.,宾语从句,条件状语从句,条件状语从句,宾语从句,BettywillvisittheHistoryMuseumifit_(rain)tomorrow.Benwantstoknowifit_(be)finetomorrow.,If引导的条件状语从句应遵从主从句是时态相呼应原则,不用一般将来时If引导的宾语从句主句是一般现在时态,if引导的宾从该用什么时态就用什么时态。
doesntrain,willbe,是否,如果,Exercises:
Hewillhelpmewithmymathsifhe_free.AwasBwillbeCwouldbeDis2.Pleasetellhermytelephonenumberifshe_(want)toknow.,wants,D,D,3.Idontknowifmyuncle_.Ifhe_,Iwillbeveryhappy.Acomes;
willcomeBwillcome;
willcomeCcomes;
comesDwillcome;
comes,D,()4.Ifit_sunnytomorrow,I_boating.A.isgoB.willbe,goC.is,willgoD.willbe,willgo()5.-whatwillyoudoifit_tomorrow,-IllstayathomeandwatchTV.A.rainB.rainsC.willrainD.israining,C,B,if条件句不一般,几个要点记心间;
条件句,放在前,逗号要放句中间。
条件句表可能,主将从现不一般;
条件句表事实,主句常用现在时If还有“是否”意,宾语从句放后边,summary,Competition,VS,ifwillshe,callme,I,tellheraboutit,Ifshecallsme,Iwilltellheraboutit.,he,come,nextweekend,I,tellyou,Ifhecomesnextweekend,Iwilltellyou.,notrain,gohiking,thisafternoon,Ifitdoesntrain,Iwillgohikingthisafternoon.,it,besunny,she,flyakite,Ifitissunny,shewillflyakite.,he,havefreetime,gotoShanghai,Ifhehasfreetime,hewillgotoShanghai.,she,studyhard,she,getgoodgrades,Ifshestudieshard,shewillgetgoodgrades.,