八年级上册人教版英语上课课件Unit8第3课时（SectionAGrammarFocus3a-3c）

人教版·八年级英语上册授课老师：王老师UNIT8Let’scommunicate!第3课时（SectionAGrammarFocus3a-3c）EnjoyasongIfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou’renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I’llpickupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.3aReadthesentences.Findmoresentenceswithif-clausesinSectionA.What’sthesimilarity(相似性)ofthesesentences?if引导的条件状语从句Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou’renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I’llpickupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.一般现在时一般现在时含有情态动词的一般现在时一般现在时一般现在时一般将来时一般现在时一般将来时一般现在时一般将来时Whatarethetensesofthemainclause(主句)andthesubordinateclause(从句)?位置例句SectionA1b,1c1.We’llfinishat7:00p.m.ifit’sontime.2.Ifeverythinggoeswell,I’llseeyouat7:15.3.Ifthetrafficistoobad,you’llhavetowaitforafewminutes.4.IfIvisitChinathisyear,Iwillgototheparkwithyou.5.Ifyoucanmakeit,I’llshowyouaroundthecityandletyoutastealltheyummylocalfood.6.Whenwilltherehearsalendifit’sontime?7.Whatwillthemando

ifhevisitsChinathisyear?ReadSectionAandfindmoreexamples.位置例句SectionA1d1.Ifyoucometomycity,I’llshowyouaround.2.IfIgothere,I’lltryallthedeliciouslocalfood.SectionA2aand2d1.Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.2.Ifyoucan’tmeet,justcallyourfriend.3.Someofyoumayprefertexting,butittakeslongerandcanmakethingsworseifyou’renotcarefulwithyourwords.位置例句SectionA2aand2d4.Ifyoustaycalmandsaysorry,itwillhelp.5.Ifitisstillhardtotalk,takeabreak.SectionA2e1.Ifyoucancome,I’ll

beveryhappy.2.Ifyouwanttomakesomenewfriends,thisisagoodchance.3.Ifyouneedhelp,Ithinkyoushouldtell…4.Ifyoutalkto…,Ithinkhe/shewillbehappytohelpyou.5.Ifyougothere,you’ll…6.Ifyoujoinme,wecan…条件状语从句的时态和主句的时态有何关系？Discussandsay什么是条件状语从句？条件状语从句和主句的位置关系是怎样的？条件状语从句可以和其他句式进行转换吗？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。概述Let’slearnif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。◆Ifyouwanttokeepfit,youshouldexerciseatleastthirtyminutesaday.

如果你想保持健康，你每天至少应该锻炼三十分钟。用逗号与主句隔开位置◆Thechildrenwon’tpayattentiontotheirmistakesiftheteachersdon’ttellthem.

如果老师不告诉孩子们，他们就不会注意到自己的

错误。在含有if引导的条件状语从句的主从复合句中，当主句为下列情形之一时，条件状语从句要用一般现在时表达将来的含义。（1）主句是一般将来时。◆Ifit’ssunnytomorrow,theywillgocamping.如果明天是晴天，他们就去露营。一般现在时一般将来时从句主句（主将从现）时态高频考点（2）主句是含有情态动词may,might,can,must,should

等的句子。◆Ifwestartrightaway,wecanfinishtheworkontime.一般现在时情态动词从句主句如果我们马上开始，就能按时完成这项工作。（3）主句是祈使句。◆Workhardifyouwanttopasstheexam.祈使句一般现在时从句主句如果你想通过考试，就得努力学习。（1）借助“祈使句+and/or+句子（一般将来时）”这一句型来转换。and

在句意上表示顺承，意为“那么，就”；or

表示转折，意为“否则”。句型转换高频考点◆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。◆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。Let’spractise一、用括号内所给内容的适当形式填空。1.Don’tplayfootballoutsideifit______(rain)thisafternoon.2.Ifyoudon’tlistencarefully,you____________(notknow)theanswer.rainswon’tknow3.Amyissoconfident.Shethinksshecandoanythingifshe_____(try)herbest.4._____(tell)Jimthegoodnewsifyou______(meet)himtomorrowmorning.5.Myaunt_________(take)mycousinandmetotheconcertifshe_____(get)thetickets.Tellmeetwilltakegetstries二、单项选择。1.（河北中考）_____youcanuseyourdictionary,youwilllearnEnglishbetter.A.If B.Unless C.Though D.Before2.（郴州中考）—Ireallywanttogotocollegeforfurtherstudy.—Believeinyourself.Ifyou______hard,yourdreamwillcometrue.A.willstudy B.studied C.studyAC3.（贺州中考）Idon’tknowifLucy_____toJack’spartynextSunday.Ifshe_____,sowillI.A.go;goes B.willgo;willgo C.goes;willgo D.willgo;goesD三、按要求完成句子，每空一词。1.Studyhard,andyouwillpasstheexam.（改为同义句）_____youstudyhard,you____passtheexam.2.Withoutenoughexercise,youwillgetfat.

（改为同义句）____________________takeenoughexercise,youwillgetfat.IfwillIfyoudon’t3bMatchthetwopartstomakesentences.1.Ifwecanhaveaface-tofacemeeting,2.IfIhavegoodnews,3.Ifyouneedtoleave,4.Ifyoucanfinishyourworkearlytoday,5.Iftheoldmanhas

difficultiesinhearing,6.Ifyoucan’treachherbyphone,A.trytexting.B.we’llunderstandeachotherbetter.C.youcanwritethingsdownforhim.D.I’llcallyourightaway.E.I’llcallataxiforyou.F.willyoujoinmefordinner?joinsbforsth与某人一起做某事；参与或加入某人的行列中一起做某事havedifficulties(in)doingsth做某事有困难rightaway立即；马上writedown写下；记下reachLanguagepoints①（及物动词）联系，与……取得联系

Ifyouneedhelp,youcanreachmeanytime.如果你需要帮助，你可以随时联系我。②（及物动词）到达

WeallreachedthetopofthemountainexceptTim.

除了蒂姆，我们都到达了山顶。③（动词）伸手

Shereachedinsideherbagforawallet.

她把手伸到包里拿钱包。=arrivedat/gotto3cFillintheblankswiththecorrectformsoftheverbsinbrackets....Ifthings______(go)well,we______(see)allthoseoldfacesagain.Justthinkhowgreatitwillbe!Ifyouthinkyoucancome,_____(drop)mealineandI________(give)youallthedetailsaboutthereunion.Butpromisemeyou’llthinkaboutitseriously.gowillseedropwillgivehow引导的感叹句作think的宾语Hey,it’sme.Iwantedtotalktoyouaboutthetrainingplanforourteam.Thenewseasoniscoming,soit’stimetomakeaplanforourtraining.Ifwe_____

(start)earlierthisyear,Ithinkwe___________

(perform)better.______(give)meacalland_____(let)meknowifyou_____

(think)ofagoodtimeforeveryonetomeet.Talktoyousoon!startwillperformGiveletthinkmakeaplan制订计划agoodtime

(forsb)todosth（某人）做某事的好时候LanguagepointsIt’stime(forsb)todosth.到（某人）做某事的时间了。

It’stimeforyoutogetup.你该起床了。拓展：It’stimefor(doing)sth.到（做）某事的时间了。

It’stimefortraining.到训练的时间了。3cThendiscusswhatthesituationsareandwhomtheinformationisfor....Ifthings___(go)well,we______(see)allthoseoldfacesagain.Justthinkhowgreatitwill