八年级下英语第4单元单词解析讲义市公开课一等奖省赛课获奖课件

单词讲解第1页allowallowsbtodosth允许某人做某事sbbeallowedtodosth某人被允许做某事allowdoingsth允许做某事allowsbin/out允许某人进入/出去Teenagersshouldn’tbeallowedtosmoke.

不应该允许青少年吸烟。辨析letsbdosth语气较弱，不能用于被动语态第2页guess1v.Canyouguesshowoldheis?2n.Ifyoudon’tknowtheanswer,haveaguess!

可数名词，猜测，猜测主句含有:I/Weguess/think/believe/suppose…+从句时，要进行否定前移Iguesshecanswim.Idon’tguesshecanswim.Iguesshecanswim,can’the?

第3页deal1协议；交易Ididadealwithmyparentsonhousework.

在家务上我与父母达成一项协议。2bigdeal主要事3处理，dealwith,与疑问词how连用Howwillyoudealwiththehomework?第4页communication1communicatewithsb与某人交流、沟通、联络2communicatetosb向某人汇报、通知、传达Forbettercommunication,Ialsocommunicatewithhimbyphone.

为了更加好地沟通，我还和他电话交流。第5页argue1通常与介词about和with连用,不及物动词arguewithsbaboutsth

为某事与某人争辩haveanargumentwithsbIhadanargumentwithhim.第6页cloudLookatthosedarkclouds.It’sgoingtorain.看那些乌云，要下雨了。cloud,（像云）尘土或烟雾cloudsofsmoke一团团烟cloudy多云acloudysky第7页older/elder1older,指年纪较大、较老，也指较旧TomistwoyearsolderthanJohn.Thisbookisolderthanthatone.2elder,年长，只用做定语，不用作表语He

ismyeldersister.Weshouldrespectourelders.

我们应该尊重长辈。第8页instead1instead为副词，常放在句首或句尾Iwillgoinstead.2insteadof为介词短语，后面接名词、代词，介词短语或动名词形式Shewrotetohiminsteadofcallinghim.=Shedidn’tcallhim.Shewrotetohiminstead.第9页nervous比较级：morenervous最高级：mostnervousbenervousof/about…对…感到担心Theyarenervousof/abouttheirtest.第10页offer1.offersbsth/offersthtosb向某人提供某物

注：能够接收，也能够不接收2.offertodosth提议去做某事Iofferedherabook.我给了她一本书。Heofferedtohelpme.他向我提供帮助。辨析：provide强调为应付意外、突发事件、紧急情况等做好充分准备而“提供，供给”，多数情况是无偿。providesbwithsth为某人提供某物providesthforsb

第11页proper/explainHeneverexplainsanythingproperly.他从来不好好解释任何事情。explainoneself解释，交代清楚explainsthtosb向某人解释某事Aliceusuallyexplainsthenewwordstous.explanationn.解释，说明第12页clear1.清楚易懂；晴朗Shespokeinaloudclearvoice.

她说话声音既洪亮又清楚。2.清澈；透明clearwater清澈水；clearglass透明玻璃3.clearly清楚地，明白地辨析：clean洁净；清洁；而clear表清澈cleanwater洁净水（强调没有尘污）clearwater清澈水（强调清澈、透明）第13页return1.return=comeback/gobackreturnto=gobackto=comebackto2.return,偿还；还给returnsthtosb/returnsbsth偿还某人某物Pleasereturnthemoneytoher.注：是非延续动词，不能够与表示一段时间状语连用。第14页competecompetition竞赛，比赛competitor参赛选手enteracompetition参加比赛

competewithsb…against……for…TeamsfrommanycountriescompeteintheWorldCup.

很多国家球队参加世界杯比赛。第15页opinion1.同义词：idea;thought;viewWhat’syouropinionofmywork?

对我工作您有什么意见？2.inone’sopinion=Ithink…在某人看来Inmyopinion,youareright.

我认为你是正确。insistonone’sopinion坚持某人观点第16页skill技艺，技巧Itneedsagreatskilltoflyaplane.

开飞机需要很高技巧。skillful孰练

扩展：Practicemakesperfect.Skillcomesfrompractice.

第17页quick1Haveaquicklook.Hetookouthisbookquickly.辨析：fast:形容词/副词，强调动作速度之快。quick:形容词，着重动作快速发生或完成

即刻行动，豪不耽搁soon:强调时间，很快；马上，即很快以后将发生某个动作或某种情况。I’llwritetoyouassoonaspossible.第18页continue1连续，继续存在，接名词、动名词、不定式或名词性从句做宾语Howfardoestheroadcontinue?

这条路有多长？continuedoingsth继续做原来事=goondoingsthcontinuetodosth继续做某事（另一件事）AfterfinishingUnit3,let’scontinuetolearnUnit4.辨析：continue;goon;last第19页continue指进程在时间或空间上延续，有时也可指短暂停顿后继续进行。Hecontinuedtheworkforthreehours.goon：goontodosth=continuetodosthgoondoingsth=continuedoingsthlast:说明某一动作要延续一段时间。Shewon’tlastlonginthatjob.那份工作她做不了多久。第20页compare1compare…with…将…与…比较compare…to…把…比作…Don’tcompareyourselfwithothers.

不要与他人比较。Childrenarecomparedtonationalflowers.第21页crazy1不理智，疯狂Youmustbecrazytowalkatnightwithnolights.2热衷，狂热Sheiscrazyaboutpopmusic.3crazilyadv.疯狂地，热衷地第22页causeSmokingcancauselungcancer.吸烟能造成肺癌。Whatwasthecauseoftheaccident?Youhavenocausetocomplain.辨析：cause:引发某种结果原因，后接ofreason:指决定做某事或采取某项行动理由。excuse:辩解，借口第23页perhapsmaybe=perhaps,位于句首或句末Maybe/Perhapsitwillraintomorrow.probably可能性大于maybe/perhaps.Hewillprobablycometomorrow.possibly较probably可能性小

在必定句里可能性很小，在否定、疑问句中与can/c