Unit8SectionA(Grammar)课件-人教版英语八年级上册

Let’sCommunicate!Unit8SectionA(Grammar)小红书：Christina在努力小红书：Christina在努力masterthestructureandusageofif-clausesinconditionalsentences.talkaboutconditionsandresultsusingtheif-clausesindifferentsituations.小红书：Christina在努力小红书：Christina在努力Let’senjoyEnjoyasongandcompletethesentences.

_______youeverfindyourselfstuckinthemiddleofthesea,_________theworldtofindyou._______youeverfindyourselflostinthedarkandyoucan’tsee,_________thelighttoguideyou.IfI’llsailIfI’llbe小红书：Christina在努力小红书：Christina在努力_________theworldtofindyou._________thelighttoguideyou.IfI’llsailI’llbe_______youeverfindyourselfstuckinthemiddleofthesea,_______youeverfindyourselflostinthedarkandyoucan’tsee,IfFocusonthesesentences.Let’senjoy两个句子都是：_________________If引导的条件状语从句小红书：Christina在努力小红书：Christina在努力If引导的条件状语从句是一种表示条件关系的从句。用于描述在某种条件下会发生的结果。这种从句通常用于表示_____________的关系，其中if作为引导词，表示“如果”的意思。如果...那么...Ifclausecanbeusedtoexpressapossibilityinthefutre(itisnotcertainthatitwillhappen,butitispossible)orwhentalkingaboutrealandpossiblesituationsinthefuture.Let’slearnIf引导的条件状语从句小红书：Christina在努力小红书：Christina在努力If引导的条件状语从句用法_________theworldtofindyou._________thelighttoguideyou.IfI’llsailI’llbe_______youeverfindyourselfstuckinthemiddleofthesea,_______youeverfindyourselflostinthedarkandyoucan’tsee,If观察句子意思可以发现：在含有if引导的条件状语从句的复合句中，表示将来时态时，主句通常使用___________,而从句则使用___________，

这被称作“_________”原则。跟在if后的是从句主句一般将来时一般现在时主将从现小红书：Christina在努力小红书：Christina在努力观察句子意思可以发现：在含有if引导的条件状语从句的复合句中，表示将来时态时，主句通常使用___________,而从句则使用___________，

这被称作“_________”原则。一般将来时一般现在时主将从现Completethesentenceswiththewordsinthebox.3.Iftherehearsal_______(end)at7:00p.m.,Iwillpickyouupat7:15p.m.1.Ifyoustaycalmandsaysorry,it___________(help).2.IfIgothere,I___________(try)allthedeliciouslocalfood.willhelpwilltryendslfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou'renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I'llpickyouupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.如果你想解决问题的话，面对面交谈通常是最有效的办法。倘若你在措辞上不够谨慎，发短信反而可能会使情况变得更糟。如果彩排于晚上7点结束，我将于7点15分去接你。如果你能保持冷静并道个歉，这将会有所帮助。如果我前往那里，我会尝试所有美味的当地美食。翻译：3a小红书：Christina在努力小红书：Christina在努力Readthesentences.Findmoresentenceswithif-clausesinSectionA.lfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou'renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I'llpickyouupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.These“if...will”sentencesarecalledTheFirstConditional第一条件句.3a

零条件句(ZeroConditional)主将从现主现从现主情从现if引导的条件状语从句在复合句中作条件状语的句子叫条件状语从句。条件状语从句常用if来引导。If引导的条件状语从句包含零条件句和第一条件句。零条件句：一般表示普遍存在的事实、真理或习惯行为。条件成立时，结果必然出现，不存在任何不确定性。第一条件句：用于表示在特定条件下可能会发生的情况。结果的实现是有条件的，且这个条件有实现的可能性。含义if引导的条件状语从句，既可放在主句前，也可放在主句后。位于主句前，要用逗号与主句隔开；位于主句后，其前不必用逗号。用逗号与主句隔开位置从句位置灵活Ifyoustaycalmandsaysorry,itwillhelp.Itwillhelpifyoustaycalmandsaysorry.=Zeroconditionals零条件句

描述客观事实、自然规律、普遍真理或习惯性行为。

条件成立时，结果必然发生。e.g.Ifyouheatwaterto100°C,itboils.如果你把水加热到100°C，它就会沸腾。

Ifthesunsets,itgetsdark.如果太阳落山，天就会变黑。结构：时态客观事实自然规律If+一般现在时，主句+一般现在时。主现从现e.g.Ifitrainstomorrow,wewillstayathome.

如果明天下雨，我们就待在家里。Firstconditionals第一条件句

表示在特定条件下可能会发生的情况、结果或行为。

表达将来可能发生的条件和结果，结果发生的可能性较高。结构：主将从现从句主句一般将来时一般现在时从句用一般现在时表示将来意义If+一般现在时（）,主句+一般将来时（）v.原/v.swill+v.原e.g.Ifwestartrightaway,wecanfinishtheworkontime.

如果我们马上开始，就能按时完成这项工作。If+一般现在时（）,主句+主情从现从句主句含情态动词的一般现在时一般现在时结构：v.原/v.scan/may/must情态+v.原e.g.Workhardifyouwanttopasstheexam.

如果你想通过考试，就得努力学习。If+一般现在时（）,主句+祈使句（）主祈从现主句从句一般现在时祈使句结构：v.原/v.sv.原小红书：Christina在努力小红书：Christina在努力主将从现主情从现主祈从现If+一般现在时（v.原/v.s）,主句+一般将来时（will+v.原）If+一般现在时（v.原/v.s）,主句+can/may/must情态+v.原If+一般现在时（v.原/v.s）,主句+祈使句（v.原）Ifyourmotherneedshelp,callme.Ifyoucometomycity,I’ll

showyouaround.Ifhehastime,hecan

helpme.If+一般现在时(v.原形/v.s)，主句：一般将来时(will/shall/begoingto/can/may/must+动词原形)第一条件句的核心结构搭配:小红书：Christina在努力小红书：Christina在努力主将从现主情从现主祈从现If+一般现在时（v.原/v.s）,主句+一般将来时（will+v.原）If+一般现在时（v.原/v.s）,主句+can/may/must情态+v.原If+一般现在时（v.原/v.s）,主句+祈使句（v.原）第一条件句的核心结构搭配:句型转换1.借助“祈使句+and/or+句子（一般将来时）”句型来转换。and在句意上表示顺承，意为“那么，就”；or表示转折，意为“否则”。e.g.Ifyougetupearly,you’llcatchtheschoolbus.=Getupearly,andyou’llcatchtheschoolbus.=Getupearly,oryouwon’tcatchtheschoolbus.

早点起床，你就会赶上校车。2.借助without或with来转换条件状语从句。e.g.Ifthereisnosunshine,plantswilldie.=Plantswilldiewithoutsunshine.

如果没有阳光，植物将会死亡。

Ifyouhelpme,I’llgetbettergrades.=Withyourhelp,I’llgetbettergrades.

如果你帮助我，我将取得更好的成绩。1)Putupyourhandsifyou___________(have)anyquestions.2)Ifit___________(be)coldtomorrow,Iwillwearmysweater.3)Hecangohomeifhe___________(finish)hishomework.4)如果他来了，我们会让你知道的。Ifhe___________,we___________youknow.5)如果她有空，她会开车来我家的。Ifshe___________,she_________tomyhome.finisheshaveis【语境应用】完成句子。comeswillletisfreewilldrive句型转换。1.Theywillinviteme.I’llgototheparty.

(用if合并为含有条件状语从句的复合句，且从句在前)2.I’llcomebacklatethisevening.Don’twaitformetohavedinner.(用if合并为含有条件状语从句的复合句，且从句在后)Iftheyinviteme,Iwillgototheparty.Don’twaitformetohavedinnerifIcomebacklatethisevening.小红书：Christina在努力小红书：Christina在努力规则类型‌‌从句时态‌‌主句时态/结构‌‌真实条件（将来‌一般现在时一般将来时（will/shall）‌真实条件（情态）一般现在时情态动词（can/must等）‌真实条件（祈使）一般现在时祈使句Now,let’sfindmoresentenceswithif-clausesinSectionA.Ifyoucometomycity,I’llshowyouaround.IfIgothere,I’lltryallthedeliciouslocalfood.If

yougiveacatsomemilk,shewillbecomeyourfriend.Ifshebecomesyourfriend,shewillprobablyfollowyoueverywhere.

Ifshefollowsyoueverywhere,shemaywanttoplaygameswithyou.

If

youplaygameswithher,youmightgettired....小红书：Christina在努力小红书：Christina在努力小红书：Christina在努力havedifficultiesindoingsthA.trytexting.B.we'llunderstandeachotherbetter.C.youcanwritethingsdown

forhim.D.I'llcallyourightaway.E.I'llcallataxiforyou.F.willyoujoinmefordinner?n./ˈmiːtɪŋ/n./ˈdɪfɪkəlti/Matchthetwopartstomakesentences.3bFindthekeywordsfirst!1.Ifwecanhaveaface-to-face

meeting,2.IfIhavegoodnews,3.Ifyouneedtoleave,4.Ifyoucanfinishyourworkearlytoday,5.Iftheoldmanhasdifficultiesin

hearing,6.Ifyoucan'treachhimbyphone,小红书：Christina在努力Ifthings______(go)well,we_______(see)allthoseoldfacesagain.Justthinkhowgreatitwillbe!Ifyouthinkyoucancome,_______(drop)mealineandI________(give)youallthedetailsaboutthereunion.Butpromisemeyou’llthinkaboutitseriously.

Fillintheblankswiththecorrectformsoftheverbsinbrackets.Thendiscusswhatthesituationsareandwhomtheinformationisfor.gowillseedropwillgiven./laɪn/3cdropsb.aline=writetosb....detailn./ˈdiːteɪl/adv./ˈsɪərɪəslɪ/n./ˌriːˈjuːniən/takesth.seriously认真对待某事小红书：Christina在努力Hey,it’sme.Iwantedtotalktoyouaboutthetrainingplanforourteam.Thenewseasoniscoming,soit’stimetomakeaplanforourtraining.Ifwe

_________

(start)earlierthisyear,Ithinkwe

_____________

(perform)better.

_________

(give)meacalland

_______

(let)meknowifyou

_______(think)ofagoodtimeforeveryonetomeet.Talktoyousoon!startwillperformGiveletthink

Fillintheblankswiththecorrectformsoftheverbsinbrackets.Thendiscusswhatthesituationsareandwhomtheinformationisfor.3citistimetodosth.到做某事的时候了n./ˈtreɪnɪŋ/小红书：Christina在努力Whatsituationiseachtextabout?Whoistheinformationfor?Situation:

Organizingaclassreunion.Audience:

Anoldclassmate/friend.Let’sdiscussANOTEAVOICEMESSAGESituation:

Planningasportsteam’strainingschedule.Audience:

Ateammate/coach.小红书：Christina在努力1.Iftheoldmanhasdifficultiesinhearing,...如果老人听力有困难，……difficulty作名词,意为“困难;难题”,其常见用法如下:have/has/haddifficulty(in)doingsth做某事有困难have/has/haddifficultywith...在某方面有困难►Hehasdifficulty(in)speakingEnglish.他讲英语有困难。►Shehasdifficultywithspelling.她在拼写方面有困难。Languagepoints小红书：Christina在努力【辨析】difficulty、problem与troubledifficulty强调“困难本身”或“需要努力解决的问题”(如学习困难、生活难题)Shehadgreatdifficulty(in)understandingthemathsproblem.她理解这道数学题有很大困难。problem指“需要解决的具体问题”(如数学题、机器故障)Letmeknowifyouhaveanyproblems.你若有困难就告诉我。trouble更口语化,常指“麻烦或困境”Hecouldmaketroubleformeifhewantedto.他要是想找麻烦就能给我找麻烦。Languagepoints小红书：Christina在努力2.Butpromisemeyou’llthinkaboutitseriously.但答应我你会认真考虑。seriously作副词,意为“严肃地;认真地”。take...seriously意为“认真对待…”。Don’ttakeitseriously—he’sonlyjoking.别把它当真,他只是在开玩笑。【拓展】seriously的形容词形式为serious,意为“严肃的;认真的”。beseriousabout意为“对……认真”。Languagepoints小红书：Christina在努力小红书：Christina在努力(3)linen.意为“字行；便条；线”。drawaline画一条线，dropsb.aline给某人写信。line作名词还可意为“行列；队伍”。常用搭配stand/waitinline站队/排队等候cutinline插队line还可意为“电话线路”。常用搭配holdtheline别挂断电话ontheline通话中Languagepoints小红书：Christina在努力一、按要求写出正确的单词、词组或句子。会议(名词)__________2.困难(名词)___________3.立即；马上(动词)__________4.字行(名词)__________5.给……写信(短语)__________6.细节(名词)__________7.团聚（名词）__________