初中英语八年级上册Unit 10 If you go to the partyyou'll have a great time Section A 2d-3c 教学课件

Unit10Ifyougototheparty,you’llhaveagreattime.SectionA(2d-3c)Warming-upLet'senjoyvideosandfillintheblanks.Ifthey____(go)totheparty,they__________________.gowillhaveagreattime.=They_________(have)agreattimeifthey_____(go)totheparty.willhavego主将从现从句主句Ifshe_____(wear)oldclothes,she______gototheparty.Ifshe__________(notgo)totheparty,she__________(sad).wearswon’tdoesn’tgowillbesad=she______gototheparty

ifshe_____(wear)oldclothes.won’twears=She__________(sad)ifshe__________(notgo)totheparty.willbesaddoesn’tgo主将从现从句主句Ifshe_____beautifulclothes,she______totheparty.Ifshe_________totheparty,she____________________.wearsgoeswillhaveagreattime.willgo=She______gototheparty

ifshe_____beautifulclothes.willgowears=She_________(have)agreattimeifshe_____(go)totheparty.willhavegoes主将从现从句主句从句主句主句从句（一般现在时）（一般将来时）（一般现在时）（一般将来时）主将从现

If

Igototheparty,

I’llhaveagreattime.

I’llhaveagreattimeifIgototheparty.if条件状语从句

Ifsb./sth.

…,sb./sth.

…Do(es)/am/is/arewilldo/willbesb./sth.

if

sb./sth.

…do(es)/am/is/arewilldo/willbeABAB1212if条件状语从句IfIhave100yuan,Iwillbuysomebooks.IfIbuysomebooks,Iwillreadthemeveryday.IfIreadbookseveryday,Iwillgetgoodgrades.IfIgetgoodgrades,myparentswillbehappy.Ifmyparentsarehappy,Iwillgetmoremoney.IfIgetmoremoney,Iwillbuymorebooks.Let’splay“If”game!ChaingameJeff:Hey,Ben.Forthepartynextweek,shouldweaskpeopletobringfood?Ben:No,let'sorderfoodfromarestaurant.Ifweaskpeopletobringfood,they'lljustbringpotatochipsandchocolatebecausethey'llbetoolazytocook.Jeff:OK.Forthegames,doyouthinkweshouldgivepeoplesomesmallgiftsiftheywin?Ben:Ithinkthat'sagreatidea!Ifwedothat,morepeoplewillwanttoplaythegames.Jeff:Yes,thegameswillbemoreexciting,too.

Ifweaskpeopletobringfood,they'lljustbringpotatochipsandchocolate

Ifwedothat,morepeoplewillwanttoplaythegames.Pre-readingSkim2dandfindouttheif-clauses.Readcarefullyandanswerthequestions.ReadingTask1.WhatareJeffandBentalkingabout?2.WillBenandJeffaskpeopletobringfoodfortheparty?4.WhatwillhappenifBenandJeffaskpeopletobringfood?Foodandgamesforthepartynextweek.No,theywon’t.They’lljustbringpotatochipsandchocolatebecausethey’llbetoolazytocook.5.SowhatwillBenandJeffdo?6.Forthegames,willtheygivepeoplesomesmallgiftsiftheywin?7.Whatwillhappenifwegivepeoplesomesmallgiftsiftheywin?Yes,theywill.Morepeoplewillwanttoplaythegames.Theywillorderfoodfromarestaurant.Jeff:Hey,Ben.Forthepartynextweek,shouldweaskpeopletobringfood?Ben:No,let’s

order

food

fromarestaurant.Ifweaskpeopletobringfood,they’lljustbringpotatochipsandchocolatebecausethey’llbe

toolazyto

cook.Jeff:Ok.Forthegames,doyouthinkweshouldgivepeoplesomesmallgiftsiftheywin?Ben:Ithinkthat’sagreatidea!Ifwedothat,morepeoplewillwanttoplaythegames.Jeff:Yes,thegameswillbemoreexciting,too.

Listenandrepeat.2dorder…from…从…预定too…to…太…而不能…1....becausethey’llbetoolazytocook.“too+形容词/副词+todosth.”表示“太……而不能……”。在形式上是肯定结构，但表达的却是否定意义。too后接动词原形。拓展：too…to…可与not…enoughtodo（不够…而不能）以及so…that…（如此…以至于…）进行同义转换。例：他太小了，不能去上学。(翻译)___________________________________________________________________________________________________________Heistooyoungtogotoschool.Heisnotoldenoughto

gotoschool.Heissoyoungthathecan’tgotoschool.

2.thegameswillbemoreexciting,too.【辨析】exciting,excitedexciting令人兴奋的,用于形容感情方面影响他人的人或事,主语一般是物或用来修饰物,在句中作表语或定语。excited为形容词,表示“兴奋的”,多指人受到事物的影响,主语一般是人或用来修饰人,在句中作表语。例：Areyou______aboutgoingtoBeijing?你要去北京了，感到兴奋吗？

Hetoldusan_____________yesterday.他昨天给我们讲了一个使人激动的故事。excitedexcitingstory类似的还有bored/boring;suprised/suprising;interested/interesting...

BenandJeffareplanningfortheparty________.Thewon’taskpeopletobringfood.___theyaskpeople_______(bring)food,they________(bring)potatochipsand________becausethey______toolazytocook.Sotheywill_____foodfromarestaurant.Forthegames,Benthinksthattheyshouldgivepeoplesomesmallgifts___theywin.___theydothat,_____people________toplaythegamesandthegameswillbe____________.ConsolidationFillintheblanksaccordingtotheconversation.willwantmoreexcitingmore

ordertobring

willbringifIfIfwillbenextweekchocolate1.Readandact2dout.Roleplay2.Retell2aaccordingtothekeyexpressions:Jeff:Hey,Ben.Fortheparty...,shouldwe...?Ben:No,Let'sorder...from...If...,they'll...because...too...to....Jeff:OK.Forthe...,doyouthinkweshould...if...?Ben:Ithink...!If...,morepeoplewill...Jeff:Yes,thegameswillbe...IthinkI'lltakethebustotheparty.Ifyoudo,you'llbelate.IthinkI'llstayathome.Ifyoudo,you'llbesorry.Whatwillhappeniftheyhavethepartytoday？Iftheyhaveittoday,halftheclasswon'tcome.Shouldweaskpeopletobringfood？Ifweaskpeopletobringfood,they'lljustbringpotatochipsandchocolate.Ifyoutakethebustotheparty,you’llbelate.Ifyoustayathome,you’llbesorry.为避免重复,条件状语从句常用助动词do(does/did)来替代上文所提到的动作。Presentationif引导的条件状语从句if-clauseIf是连词，表示假设或条件，意思是“如果…的话”，通常表示假设，表示将会发生和可能发生的事，或进行提醒警告。if从句可以放在句首,也可以放在句末。句子结构：If+从句mainclause，主句。=主句+if+从句。（从句谈论可能的活动，主句谈论可能的结果）我们用“主句用一般将来时,if引导的从句用一般现在时”的条件句来谈论可能发生的事件。if从句的一般现在时用于表述可能发生的动作或情况,主句用一般将来时表述条件成立时可能产生的结果。(即主将从现)Ifhe_____late,he________lateforschool.getsupwillbe=Hewillbelateforschoolifhegetsuplate.句子结构：If+从句，主句。=主句+if+从句。可能发生的事件（主将从现）

Whatwillhappen

ifheislate?Ifhe

late,histeacherangry.=Histeacherwillbeangryifheislate.iswillbe可能发生的事件（主将从现）Whatwillhappenifhisteacherisangry?Ifhisteacher

angry,hesad.=Hewillbesadifhisteacherisangry.iswillbe可能发生的事件（主将从现）VideotimeLet'senjoyasongandtrytofillintheblanks.Ifyou_____happy,andyou_____it,_____yourhands.(Clap!Clap!)Ifyou'rehappy,andyouknowit,Clapyourhands.(Clap!Clap!)Ifyou_____happy,andyou_____it,Then,yourface_____surely_____it,Ifyou'rehappy,andyouknowit,Clapyourhands.(Clap!Clap!)Ifyou_____happy,andyou_____it,_____yourfeet.(Stomp!Stomp!)areknowclapareknowwillshowareknowstomif引导的条件状语从句注意：1.如果主句是祈使句，那么从句通常要用一般现在时。(即主祈从现)Ifyou_____(want)tohaveachat,_____(call)meup.如果你想聊天，打我电话。__________(notwait)formeifI_____(be)late.如果我迟到，就别等我。改同义句：wantcallDon'twaitamCallmeupifyouwanttohaveachat.IfIamlate,don'twaitforme.注意：if引导的条件状语从句通常不用一般将来时。注意：2.如果主句是含有must，can，may等情态动词时，根据需要从句多用一般现在时thesimplepresenttense。(即主情从现)Youcan_____theexamifyou_____(work)hard.如果你努力学习，你就能通过这次考试。Youmust_____ifthetrafficlight____(be)red.如果交通灯是红色，你必须停下来。改同义句：passworkstopisIfyouworkhard,youcanpasstheexam.Ifthetrafficlightisred,youmuststop.注意：if引导的条件状语从句通常不用一般将来时。注意：4.表示真实条件、客观真理、自然现象、定理定义、民间谚语等，句型是：If+句子（一般现在时），+主句（一般现在时）.(即主现从现)必然的结果theresultthatwillcertainlyhappen如果温度低于零摄氏度,水就会变成冰。Ifthetemperaturet____belowzero,water____(turn)intoice.=Water____(turn)intoiceifthetemperature____belowzero.isturnsturnsisif条件句不一般，几个要点记心间；条件句，放在前，逗号要居中间；条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。注意：1.if还可以用于宾语从句中，表示“是否”，相当于whether，引导宾语从句，时态需根据语境确定。如：Idon'tknowifitwillraintomorrow.我不知道明天是否会下雨。记忆口诀：2.If条件句还有同义句：祈使句，and/or+将来时态的陈述句。Workhard,andyouwillmakegreatprogress.（and并且）=Ifyouworkhard,youwillmakegreatprogress.如果你努力学习，你才会取得大的进步。Hurryup,oryouwillbelate.（or否则）=Ifyoudon'thurryup.youwillbelate.如果你不快点，你就要迟到了中考链接

IfIhaveadream,I__________workingonitseriously.【2018昌平一模】A.keep

B.

kept C.willkeep D.keeping【考点精析】本题考查条件状语从句的基本用法。if是条件状语从句的引导词之一，意思是“如果”，当条件状语从句所连接的两个动作还未发生时，要遵循主将从现原则，即主句用将来时（一般将来时为主），从句用现在时（一般现在时为主），本题句意为“如果我有一个梦想的话，我就会一直努力认真地实现它”。可知“有梦想”和“不断努力”的动作均未发生，故应用主将从现原则，答案为C。(2017•湖北咸宁)一Celia,joinusintheSuperSummerCampifit_________thisweekend.一I’dloveto.Butnobodyknowsifit_________.A.isfine;rainsB.isfine;willrain C.willbefine;willrainD.willbefine;rains【答案】B【解析】本题第一空考查if（如果）条件状语从句的基本用法。句意为“如果这周末天气好的话......”，第二空意为“没人知道是否会下雨”，if在此表示“是否”。答案为B。Consolidationunless引导的条件状语从句unless是连词，表示假设或条件，意思是“意为“除非”，和if…not(如果……不……)的意思相近，且两个结构通常可以互换使用。Ifyoudon’tfinishyourhomework,Iwon’tletyouplayoutside.如果你不完成你的作业,我不会让你出去玩。=Unlessyoufinishyourhomework,Iwon’tletyouplayoutside.除非你完成你的作业,否则我不会让你出去玩。注意：在unless引导的从句里，通常用现在时表示将来。【运用】用unless和if…not完成句子。1.如果明天不下雨，我们就去远足。Ifit_____________________,wewillgohiking.=Wewillgohiking___________________________.2.除非天下雨，他通常是走路去上学。Heusually_____________onfootifit___________.=_____________,heusually___________onfoot.3.如果你现在不走，你就赶不上火车了。Ifyou______________,you__________thetrain.=___________________,you__________thetrain.unlessitrainstomorrowdoesn’traintomorrowgoestoschoolUnlessitrainsgoestoschooldoesn’traindon’tleavenowUnlessyouleavenowwon’tcatchwon’tcatch注意：if…not和unless引导的从句和主句的位置可以互换。但是当从句在前,主句在后时,一般用逗号隔开,反之,则不用逗号。Ifshedoesn’tstartoffnow,shewillbelate.Shewillbelateifshedoesn’tstartoffnow.如果她现在不出发,她会迟到。Unlessshestartsoffnow,shewillbelate.Shewillbelateunlessshestartsoffnow.除非她现在出发,否则她会迟到。注意：unless用于引出某事发生或成立所必需的条件。中考链接【2018西城二模】Maryoftenwalksthedogintheafternoon______badweatherstopsher.A.when B.unlessC.because D.since【答案】B【解析】本题第一空考查unless（除非）条件状语从句的基本用法。句意为“玛丽经常下午遛狗，除非坏天气拦住她”，When当...时候，because因为，since自从，和句子意思不符。3aFillintheblankswiththecorrectformsoftheverbsinbrackets.DearSuMei,Idon’t______(know)whatto____(do)aboutgoingtoMike’sbirthdaypartytomorrownight.Myparents_____(think)IshouldstudyformyEnglishexamnextweek.IfI_____(go)totheparty,they_______(be)upset.Mike______(tell)ustowearniceclothes,butIdon’t________(have)any.IfI_______(wear)jeans,I_______(look)theworst.Also,I’mnotsurehowto______(go)totheparty.IfI______(walk),it________(take)metoolong.IfI_______(take)ataxi,it______(be)tooexpensive.Canyougivemesomeadvice