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,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 4,Global warming,Learning about language,选修六,Unit 4选修六,Discovering useful words and expressions,1 Find the words in the text that have these two meanings.Take notice of the meaning used in the reading passage,write the words and mark their usage in the chart.,Discovering useful words and e,Possible meanings,Word,Which used,1.n.a general tendency in the way a situation is changing,2.v.to start doing something that everyone copies,trend,1,Possible meaningsWordWhich use,Possible meanings,Word,Which used,1.v.to make something(especially something bad)increase,2.n.a substance that can be burned to make heat or energy,fuel,2,Possible meaningsWordWhich use,Possible meanings,Word,Which used,1.n.the physical or mental condition of someone,2.v.to formally say or write some information,or an opinion,1.v.to use time,energy,goods,etc,2.n.(formal)to eat or drink something,state,2,consume,1,Possible meaningsWordWhich use,Possible meanings,Word,Which used,1.v.to look quickly at someone or something,2.v.to read something very quickly,glance,2,Possible meaningsWordWhich use,1.Charles Keeling collected _on the carbon dioxide content in the atmosphere over a forty-year period.He found that the amount of carbon dioxide _ increasing during that time.,data,kept on,2 Complete each sentence with,one of new words or phrases.,1.Charles Keeling collected _,2.Although we are burning coal in huge,_ every year,we wont,_ of it for centuries.,3.If the amount of greenhouse gases,continues to _,we could be,facing a global _.,quantities,run out,build up,catastrophe,2.Although we are burning coa,4.Many scientists believe that global,warming has _ through the,burning of fossil fuels.,5.The _ of a rising sea,level would be widespread flooding.,come about,consequence,4.Many scientists believe tha,6.On the whole the warming of the,earth is a _ that causes,great concern.,7.The _ shows temperature,changes during the 20th century.,8.One hectare of forest can absorb 23,tons of carbon dioxide _ year.,phenomenon,graph,per,6.On the whole the warming of,9.The washing machine uses too much,energy,but _ we buy a more,economical one,it would still use too,much water.,10.The car accident on the main road,yesterday _ one drivers,death.,even if,resulted in,9.The washing machine uses to,Grammar,It,的用法及强调句型,GrammarIt的用法及强调句型,由,it,引导的强调句结构,：,It is(was)+,被强调部分,+that(who)+,句子其他部分,注意,:,此结构强调的成分仅限于主语,宾语和状语。,由it引导的强调句结构：,如：,原句,:,My father,did,the experiment,in the lab,yesterday evening,强调主语,:,It was,my father,who/that,did the experiment in the lab yesterday,evening,如：,强调宾语,:,It was,the experiment,that my father did in the lab yesterday evening,强调时间,:,It was,yesterday evening,that my father did the experiment in the lab,强调宾语:It was the experiment th,强调地点,:,It was,in the lab,that my,father did the experiment yesterday,evening,e.g.It was,in that city,that we met for,the first time,It was,not until he told me,that I,knew the truth,强调地点:It was in the lab that m,1.,强调句的一般疑问句句型：,Is/Was+it+,所强调的部分,+that/,who/whom+,其余部分,?,Was it,Tom,that/who I saw yesterday,here?,Was it,at eight oclock,that,you,began to work?,注意：,1.强调句的一般疑问句句型：注意：,2.,强调句的特殊疑问句句型：,疑问词,+,所强调的部分,+that/who+,其余部分,?,Where,was it that,you picked up,the wallet?,Why,was it that,he couldnt answer,the question?,2.强调句的特殊疑问句句型：,3.,名词性从句,(,宾语,/,表语从句,),强调句的,基本结构,:,疑问词,(,强调部分,)+it is that+,其它成分,?,I just wonder,what,it is that,makes,him excited.,He is unwilling to tell me who makes,him angry.,He is unwilling to tell me,who it is,that,made him angry.,3.名词性从句(宾语/表语从句)强调句的,4.,判断是否是强调句,可把,It is/was,that,去掉,剩余部分如果是一个完整的,句子,就是强调句。,It was,in the street,that,I met her father.,In the street,I met her father.,It was,because she was ill,that,they,didnt ask her to do the job.,Because she was ill,they didnt ask,her to do the job.,4.判断是否是强调句,可把 It is/was,1)It was in 1945 that World War II ended.,(,强调句,),2)It was 1945 when World War II ended.,(,定语从句,),3)It was a long time since I met you last.,(,时间状语从句,),1)It was in 1945 that World W,5.,若原句是,notuntil,句型,在强调,until,部分时,要把否定形式放入被强调部分。如,:,He didnt leave until l returned.,=It was,not until,I returned that he left.,5.若原句是notuntil句型,在强调until 部,I,didnt,realize she was a famous film,star,until,she,took off her dark glasses.,Not until,she took off her dark,glasses,did,I,realize,she was a famous,film star.,It was not until,she took off her,dark glasses,that,I realized she was,a famous film star.,I didnt realize she was a fam,典型例题分析,：,1)It was last night _ I saw the film,Star Wars,A.who B.when,C.that D.which,答案,C,强调句的结构是,:It+be+,强调,部分,+that(who)+,主谓句。强调句的连词,只有两个,that,和,who,。当强调的部分是人,且为句子的主语时,才用,who,其余用,that,。,典型例题分析：答案C 强调句的结构是:It+be,2)It is ten years _ Miss Green returned to,Canada.,A.that B.when,C.since D.as,答案,C,考点是连词用法。本题易误选为,A,其实本句不是强调句。若是去掉,It bethat,还应是一个完整的句子。而本句去掉,It is,that,只剩下,ten years Miss Green returned,to Canada,不成句。因此本句不是强调句。,It is+,时间,+since.,其中,is=has
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