Unit8Let'sCommunicateGrammerFocus(3a~3c)课件人教版英语八年级上册

Unit8Let’sCommunicate!GrammerFocusTranslation1.如果你想解决这个问题，一个面对面的谈话效果最佳。

2.如果你不注意你的用语，发送短信会让事情变糟。

3.如果排练在晚上7点结束，我将会在7点15分来接你。

4.如果你保持冷静并道歉，这将会有帮助。

5.如果我去那里，我将会尝试所有美味的当地食物。

Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyouarenotcarefulwithyourwords.Iftherehearsal

endsat7:00p.m.,Iwillpickyouupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.3aReadthesentences.Findmoresentenceswithif-clausesinSectionA.lfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.Textingcanmakethingsworseifyou'renotcarefulwithyourwords.Iftherehearsalendsat7:00p.m.,I'llpickyouupat7:15p.m.Ifyoustaycalmandsaysorry,itwillhelp.IfIgothere,Iwilltryallthedeliciouslocalfood.这些句子由if引导的条件状语从句和主句构成。

if-clausesif“如果，假如”，引导的条件状语从句表示在……条件下某事才能发生，从句是主句动作发生的前提或条件。当从句在主句___时，用逗号隔开；当主句在前时，则______逗号；前不用用法If引导的条件状语从句包含零条件句和第一条件句。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。零条件句：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。lfyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.一般现在时一般现在时zeroconditionalsentence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。不存在任何不确定性。If+一般现在时，主句+一般现在时。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1:“主现从现”客观事实自然规律therehearsalendsat7:00p.m.,IfI'llpickyouupat7:15p.m.youstaycalmandsaysorry,Ifitwillhelp.Igothere,IfIwilltryallthedeliciouslocalfood.从句主句特定条件未来可能发生的情况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。If+一般现在时，主句(一般将来时)。结构2：“主将从现”用括号中所给单词的适当形式填空。1.Ifit

(be)sunnytomorrow,we

(go)hiking.2.She

(call)youifshe

(have)time.3.Ifyou

(notstudy)hard,you

(notpass)theexam.4.They

(visit)themuseumifthey

(have)freetime.5.Ifyou

(help)others,others

(help)you.iswillgowillcallhasdon'tstudywon'tpasswillpasshavehelpwillhelpTextingcanmakethingsworseifyou'renotcarefulwithyourwords.情态动词一般现在时If+一般现在时，主句(情态动词may,might,can,must,should等的句子)结构3：主情从现1.Amyissoconfident.Shethinksshecandoanythingifshe

(try)herbest.2.IfMary

(want)toloseweight,sheshouldexercisemore.3.Shewantstowin.Shemustpractiseharder.(改为有if的复合句）

4.Wecan'tfinishtheworkontime.Tomdoesn'thelpus.

trieswantsIfshewantstowin,shemustpractiseharder.Wecan'tfinishtheworkontimeifTomdoesn'thelpus.结构4：主祈从现If+一般现在时，主句(祈使句)。Putupyourhandifyouhaveanyquestionstoask.Don’t

waitformeifIamlate.1.Don'tplayfootballoutsideifit

(rain)thisafternoon.2.TellJimthegoodnewsifyou

(meet)himtomorrowmorning.rainsmeet无人称主语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。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。3.Ifyouarelateagain,theteacherwillbeangry.(改为同义句)

lateagain,

theteacherwillbeangry.4.Ifyoudon'tgetenoughsleep,youmayfeeltiredeasily.(改为同义句)Youmayfeeltiredeasily

.Don'tbeorwithoutenoughsleep转换1.借助“祈使句+and(那么，就)/or(否则)+句子（一般将来时）"句型来转换。2.without表否定；with表否定Summary1.if表如果，引导的条件状语从句有零条件句和第一条件句。零条件句有

；第一条件句有

.2.做题步骤：①确定主句还是从句。if后跟着的是从句。②填从句：

；填主句：看意思，有无人称主语和条件关系。③时态原则：主将从现；主情从现；主祈从现3.位置：①主句在

，从句在

，中间

逗号②从句在

，主句在

，中间

逗号。主现从现主将从现主情从现主祈从现一般现在时前前后没有后有1.Ifyoucometomycity,I’llshowyouaround.(______________)2.We’llfinishat7:00p.m.ifit’sontime.(______________)3.Ifyouwanttomakesomenewfriends,thisisagoodchance.(______________)4.Ifitisstillhardtotalk,takeabreak.(______________)5.Ifyoucan’tmeet,justcallyourfriend.(______________)6.Ifyouwanttopasstheexam,youmuststudyhard.(____________)主将从现主将从现主现从现主祈从现主祈从现主情从现用四个字标出主句和从句的时态：主现从现/主将从现/主祈从现/主情从现。PracticeMatchthetwopartstomakesentences.1.Ifwehaveaface-to-facemeeting,2.IfIhavegoodnews,3.Ifyouneedtoleave,4.Ifyoucanfinishyourworkearlytoday,5.Iftheoldmanhasdifficultiesinhearing,6.Ifyoucan’treachherbyphone,A.trytexting.B.we’llunderstandeachotherbetter.C.youcanwritethingsdownforhim.D.I’llcallyourightaway.E.I’llcallataxiforyou.F.willyoujoinmefordinner?3b1.Ifwehaveaface-to-facemeeting,2.IfIhavegoodnews,3.Ifyouneedtoleave,4.Ifyoucanfinishyourworkearlytoday,5.Iftheoldman

hasdifficultiesinhearing,6.Ifyoucan’treachherbyphone,A.trytexting.B.we’llunderstandeachotherbetter.C.youcanwritethingsdownforhim.D.I’llcallyourightaway.E.I’llcallataxiforyou.F.willyoujoinmefordinner?一个面对面的会议rightaway立即;马上主祈从现主将从现主情从现主将从现主将从现主将从现joinsbforsth与某人一起做某事havedifficulties(in)doingsth做某事有困难writedown写下;记下有好消息；news不可数通过电话联系到她→reachv.联系;reachsb.by....通过...联系某人尝试发短信；trydoing3cFillintheblankswiththecorrectformsoftheverbsinbrackets.gowillseedropwillgivestartwillperformGiveletthink主将从现主将从现主将从现无人称主语Fillintheblankswiththecorrectformsoftheverbsinbrackets....Ifthings

gowell,wewillseeallthoseoldfacesagain.Justthinkhowgreatitwillbe!Ifyouthinkyoucancome,dropmealineandIwillgiveyouallthedetailsaboutthereunion.Butpromisemeyou’llthinkaboutitseriously.=writesb.aletter给某人写信thinkabout...seriously认真考虑.....3c进展顺利how引导的感叹句作think的宾语所有关于聚会的细节Hey,it’sme.Iwantedtotalktoyouaboutthetrainingplanforourteam.Thenewseasoniscoming,soit’stimeto

makeaplanforourtraining.Ifwestartearlierthisyear,Ithinkwewillperformbetter.Givemeacallandletmeknowifyouthinkofagoodtimeforeveryonetomeet.Talktoyousoon!makeaplanfor...为....制定计划thinkof想到→想到一个合适的时间Fillintheblankswiththecorrectformsoftheverbs