2019版高考英语一轮复习Unit4Astronomythescienceofthestars课件新人教版.pptx

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1、Book3Unit4Astronomy:thescienceofthestars语言点用法过关1.harmfuladj.有害的教材原句Whatmanyscientistsbelieveisthatthecontinuedpresenceofwateral-lowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.很多科学家相信,由于地球上长期有水存在,使地球得以把有害气体和酸性物质溶解在海洋里。语境应用单句填空①Asweallknow,abadeatinghabitisharmful(harm)toone’shealt

2、h.②AsfarasI’mconcerned,thereisnoharm(harmful)inmakinganapologytohimfirst.一句多译那时我意识到浪费时间玩电脑游戏对我的学习和健康是有害的。(2015重庆写作一)ThenIrealizedthatwastingtimeinplayingcomputergameswasharmfultomystudyandhealthdidharmtomystudyandhealthwasbadformystudyandhealth用法点拨(1)beharmfulto...对……有害(2)harmn.&vt.伤害;损害doharmtos

3、b.=dosb.harm对某人有害Thereisnoharmindoingsth.做某事没有坏处(3)harmlessadj.无害的2.existvi.存在;生存教材原句Theylaideggstooandexistedontheearthformorethan140millionyears.它们也下蛋,并且在地球上存在了1亿4千多万年。语境应用单句填空①Eventhoughheisalittleboy,strangeideasalwaysexistinhismind.②Theoldladybecameseriouslyilllastweek;shehasonlyexistedonmil

4、keversince.③Thereexists(exist)agoodwaytosolvetheproblematpresent.完成句子④Scientistshavemanytheoriesabouthowtheuniversecameintoexistence.关于宇宙是如何产生的,科学家们有多种学说。用法点拨(1)existin存在于……之中existon靠……为生Thereexists/existed...某地有……(2)existencen.存在;生存inexistence存在comeintoexistence产生;开始存在[点津]exist是不及物动词,没有被动语态,也不用于

5、进行时态。3.puzzlev.使迷惑;使为难;使困惑n.谜;难题教材原句Howlifebeganonearthisoneofthebiggestpuzzlesthatscientistsfoundhardtosolve.地球上生命的起源是科学家们难以解决的最大疑惑之一。语境应用单句填空①Thepolicearestillpuzzlingabout/overhowtheaccidenthappened.②I’vebeentryingtopuzzleoutwhyshe’ssoupset.③Tomseemedpuzzled(puzzle)aboutwhatthequestionmeant.单句

6、改错④Herpuzzlinglookonherfacesuggestedshedidn’tunderstandwhatIsaid.puzzling→puzzled用法点拨(1)puzzleover/aboutsth.苦苦思索……puzzlesth.out琢磨出……的答案(2)puzzledadj.迷惑不解的(常用来修饰人或人的表情)puzzlingadj.令人迷惑的(常用来修饰事物)1.intime及时;终于;迟早;最后教材原句Theywereintimetoproducecarbondioxide,nitrogen,watervapourandothergases,whichweret

7、omaketheearth’satmosphere.它们最终产生了二氧化碳、氮气、水蒸气和其他气体,从而形成了地球的大气层。语境应用写出下列各句中intime的含义①Andyknewhecouldnotreachthehouseintime.及时②You’llsucceedintimebecauseyouarealwaysworkinghard.迟早③Workinghardmadehimsuccessfulintime.最后句型转换