if条件从句课件

Unit

7MemoryGrammarUnitMemoryGrammar1memorycornerlose-lost-lostimprove-ed-~mentionmethodspellingmindsillymileletterworthspell-spelt-~unlesstrouble(un)liststepcycle记忆力角落失去,丧失改善,提高提到,说到方法拼写n头脑可笑的英里字母值得拼写v除非,要不然困难清单步骤循环memorycornerlose-lost-lostimpr2

Henry,PaulaandMilliearestudentsfromRosieBridgeSchool.Theywanttohelpotherstudentsi_________theirm_________,sotheywritesomearticlesfortheschoolnewspaper.Henrythinksapictureisw_______athousandwords,sohem__________agreatway—toimagineapictureinyourm_______.Itwillbebetterifthepictureisstrangeors_______.Torememberthes_________ofaword,Paulahasagoodm_______—tomakeashortsentencewitheachl_______oftheword.Forexample,sheuses“Bigelephantscanalwaysunderstandsmallelephants”torememberhowtos_______theword“because”. Milliethinksit’seasytoforgetsomethingu__________youunderstanditwell.Ifyouhavet________rememberingthel_______ofs_______ofthewaterc_______,you’dbetterunderstandhowitworksfirst.

mproveemoryorthentionsillyindpellingethodetterpellnlessroubleisttepsycleHenry,PaulaandMilliear31.这场表演不值得看.Thisshow_________________________.2.我在学习英语方面没有困难.I____________________________English.3.你知道如何提高记忆力么？

Doyouknow_________________ourmemory?4.如果他撒谎，他的父母就会惩罚他.Ifhe______alie,hisparents____________him.5.除非你放弃，要不然你就会成功.Unlessyou_____________,you_____________.isn'tworthseeinghavenotroublelearning

howtoimprove

tellswillpunishgiveupwillsucceed1.这场表演不值得看.isn'tworth4Unit7Grammar

if/unless

引导的条件状语从句

(ConditionalSentences)Unit7Grammar5Review“If”Review“If”6fathersonTheyaregoingfishingnow.fathersonTheyaregoingfishin7Ifitrains,whatwillhappen?Ifitrains,theywillgohome.Ifitrains,whatwillhappen?8Iftheboyfallsintotheriver,Whatwillhappen?Iftheboyfallsintotheriver,hisfatherwillsavehim.Iftheboyfallsintotherive9Ifhisfatherfallsintotheriver,whatwillhappen?Ifhisfatherfallsintotheriver,hewillasksomeoneforhelp.Ifhisfatherfallsintother10Iftheygetsomefish,whatwillhappen?Iftheygetsomefish,theywilleatthem.Iftheygetsomefish,Ifthey11iftheydon’tgetanyfish,whatwillhappen?

Iftheydon’tgetanyfish,theywill

beverysad.iftheydon’tgetanyfish,wh12Review:条件状语从句：If1.定义:在if引导的从句的条件下，主句可能会发生的结果。2.If引导的部分是_____,剩余部分是_______(主句/从句),if从句在前_______与主句隔开3.

时态口诀:__________.主将从现1.如果他努力学习，他将会通过考试。

Ifhe_______hard,he________theexam.=He_________theexamifhe________hard.用逗号主句studieswillpass①studieswillpass从句Review:条件状语从句：If1.定义:在if引导的从13PracticeIf

she,walktoschoolwillbelateIfshewalkstoschool,shewillbelate.Shewillbelateifshewalkstoschool.PracticeIf

she,walktoschoo14If

itraintomorrowwill

stayathomeIfitrainstomorrow,hewillstayathome.Hewillstayathomeifitrainstomorrow.If

itraintomorrowwill

sta15If

she,eattoomuch

will

beveryfatIfsheeatstoomuch,shewillbeveryfat.shewillbeveryfatifsheeatstoomuch.If

she,eattoomuch

will

be16If

it,notraintomorrow,Ifitdoesn'traintomorrow,wewillgoonaschooltrip.willwe,goonaschooltripWewillgoonaschooltripifitdoesn'traintomorrow.IfIfitdoesn'traintomorrow,17New“If”New“If”18Ifyouheatice,it______________.turnsintowaterwillturninto/turnsintoIfyouheatice,it________19Oil_______ifyoupouritonwater.willfloat/floatsfloatsOil_______ifyoupouriton20Water______ifyouheatit.boils/willboilboilsWater______ifyouheatit.bo21New--条件状语从句：If1.

定义:

在If引导的从句条件下，主句必然会发生的结果(自然规律，客观事实/真理)；

2.从句在前__________与主句隔开；3.时态口诀_________________用逗号2.

如果我把玻璃杯扔掉，它就会摔碎.

IfI_______aglass,it________.It________ifI________aglass.dropbreaks②breaksdrop从现主现New--条件状语从句：If1.定义:在If引导的从句条22PracticeIf

I,putsaltintowaterdisappearIfIputsaltintowater,itdisappears.ItdisappearsifIputsaltintowater.PracticeIf

I,putsaltintow23If

youtakefishoutofwaterdieIfyoutakefishoutofwater,itdies.Itdiesifyoutakefishoutofwater.If

youtakefishoutofwate24If

youdropaglassbreakIfyoudropaglass,itbreaks.Itbreaksifyoudropaglass.If

youdropaglassbreakIf25FinishA1inyourEnglishbook.FinishA1inyourEnglishbook261.如果他说谎（tellalie），他父母就会惩罚他.2.如果他不努力学习，他就不会成功.3.如果你足够细心，你就不会再犯错误。

4.如果你把糖放进水里，它就融化了(melt)5.如果明天天气好的话，我们就去野餐。Ifhetellsalie,heparentswillpunishhim.Ifhedoesn'tstudyhard,hewon'tsucceed/Ifhedoesn'tstudyhard,hewon'tbesuccessful.Ifyouarecarefulenough,youwon'tmakemistakesagain.Ifyouputsugarintowater,itmelts.Ifitissunny/finetomorrow,wewillhaveaicnic.1.如果他说谎（tellalie），他父母就会惩罚他.27Conditionalsentenceswith“unless”Conditionalsentences28条件状语从句：UnlessUnlessyouunderstandthingswell,youwillforgetitquickly.Themainclausetalksaboutthelikelyresult.(主句)

Theunless-clause

talksaboutapossibleaction(从句)

时态:主将从现条件状语从句：UnlessUnlessyouunders29wecanalsoputtheunless-clauseafterthemainclause.Mainclauseunlessclause当unless引导的从句在前时，___（用/不用）逗号与主句隔开当unless引导的从句在后时，则_____（用/不用）逗号与主句隔开；用不用youwillforgetitquicklyunlessyouunderstandthingswell.wecanalsoputtheunless-cla301.unless:_______(词性),意思_____________2.

Unless引导的部分是_____,剩余部分是_______(主句/从句),unless从句在前_______与主句隔开3.

时态口诀:__________.从现主将从句连词除非...要不然条件状语从句：Unless

主句用逗号1.unless:_______(词性),意思____31Unlessshewearsmoreclothes,

shewillfeelcold.Unlesswearmoreclothesfeelcold

Shewillfeelcoldunlessshewearsmoreclothes.

Unlessshewearsmoreclothes,32Unlesshegoestosleepearly,

hewillfeelsleepy.UnlessgotosleepearlyfeelsleepyHewillfeelsleepyunlesshegoestosleepearly.

Unlesshegoestosleepearly,33Unlesshelistenstoteacherscarefully

,

hewillfailtheeaxm.UnlesslistentocarefullyfailtheexamHewillfailtheeaxmunlesshelistenstoteacherscarefully.

Unlesshelistenstoteachers34Conditionalsentences“unless&If”条件状语从句：Unless&ifConditionalsentences条件状语从句：Un35Unlessitrains,wewillhaveapicnicoutside.=Ifitdoesn'train,wewillhaveapicnicoutside.

Unlessitrains,wewil36Unlesstheyhurryup,theywon'tcatchthetrain.=Iftheydon'thurryup,theywon'tcatchthetrain.Unlesstheyhurryup,theyw37Unlessitrains,wewillhaveapicnicoutside.=Ifitdoesn'train,wewillhaveapicnicoutside.

Unlesstheygetupearly,theywon'tcatchthetrain.=Iftheydon'tgetupearly,theywon'tcatchthetrain.结论:

Unless的从句____________(don't/doesn't/ben't)

主句不变=If…not从句Unlessitrains,wew381.如果明天不下雨，我们就去远足(gohiking)。Ifit_______________________,we__________.=Wewillgohiking__________________2.如果你不细心，你就会犯同样的错误.Ifyou______________,you________________________.=_____________________,you

________________________.Unless=If…notunlessitrainstomorrow.doesn’traintomorrowarenotcarefulUnlessyouarecarefulwillmakethesamemistakeswillgo

hikingwillmakethesamemistakes1.如果明天不下雨，我们就去远足(gohiking)。U39Unless=If…not3.除非天下雨，否则是走路去上学。Hewill_____________onfootifit___________.=_____________,hewill___________onfoot.4.如果你现在不走，你就赶不上火车了。

Ifyou________________,you____________thetrain.=_____________________,you_____________thetrain.gotoschooldon’tleavenowUnless

it

rainsgotoschoolUnlessyouleavenowwon’tcatchwon’tcatchdoesn’trainUnless=If…not3.除非天下雨，否则是走路去40givethemadvicebyusing

unless/if....notFreetalkgivethemadvicebyusingFre41improvehandwritinglosemarksinexamsUnless/If…notUnlessheimproveshishandwriting,hewilllosemarksinexams.Ifhedoesn'timproveshishandwriting,hewilllosemarksinexams.improvehandwritingUnless/If42Unlesshegoestobedearly,hewillbetired

Ifhedoesn'tgotobedearly,hewillbetired

gotobedearlyfeeltiredUnlesshegoestobedearly,h43Unlesshebrusheshisteetheveryday,

histeethwillgetbad.

Ifhedoesn'tbrushhisteetheveryday,

histeethwillgetbad.brushhisteethgetbadUnlesshebrusheshisteethev44Unlesshelistenstotheteachercarefully,

theteacherwillpunishhim.

Ifhedoesn'tlistentotheteachercarefully,

theteacherwillpunishhim.

listentocarefully,punishhimUnlesshelistenstotheteach45Summary条件状语从句:if从句unless从句从现主将从现主现时态口诀:个人主观意愿客观事实客观真理

Unless从句=If....not从句,

主句不变Summary条件状语从句:if从句unless从句从现主将46

IfIgetupat9:00,_______________Ifyouplattheseedsintheoil,______________________Unlessyoutakeanumbrellawithyou,________________.Iwillbelateforschool.theygrow.youwillgetwet.=If

youdon'ttakeanumbrellawithyou,youwillgetwet.IfIgetupat9:00,Ifyoup47ExercisesExercises48一、用动词的正确形式填空。1.Ifyou______(heat)water,it______(turn)intosteam.2.What___________(happen)ifcomputers_____(do)allourjobs?3.Ifthere________(be)moretrees,theair_______(be)fresher.4.Theboy___________(not,pass)theexamunlesshe_______(listen)tohisteachercarefully.5.Ifit____________(not,rain)tomorrow,we_______(go)tohaveapicnic.heatturnswillhappendoarewillbewon'tpasslistensdoesn'trainwillgo一、用动词的正确形式填空。heatturnswillhap496.He_______(help)youifhe_____(be)free.7.IfMary______________(notstudy)hard,she________(fail)theexam.8.Tim___________(miss)thefirsttrainunlesshe______(leave)homeat5:00am.9.You____________(not,study)wellunlessyou__________(work)hardbothatschoolandathome.10.Ifyou______(put)sweetintowater,they_____________.(disappear)listensisdoesn'tstudywillfailwillmisswon'tstudyleavesworkputdisappears6.He_______(help)youifh50二、单项选择1.Youwon'tgethighmarks_____youstudyhard.A.unlessB.ifC.afterD.though2.Ifyou____metal(铁),it______.A.heat,meltB.heats,willmeltC.heat,meltsD.heats,melts3.Ifhe______faster,he______thereontime.A.runs,getsB.willrun,willgetC.willrun,getsD.runs,willget

二、单项选择514.Ifit____