英语Unit4《Global warming》using language课件（新人教版选修6）.ppt

《英语Unit4《Global warming》using language课件（新人教版选修6）.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、DiscoveringusefulwordsandexpressionsDiscoveringusefulwordsandexpressions(P28)Gooverthenewwordsandphrasesintheprevioussections.Thencompleteeachsentencewithoneofthosenewwordsorphrases.21.CharlesKeelingcollected______onthecarbondioxidecontentintheatmosphereoveraforty-yearperiod.

2、Hefoundthattheamountofcarbondioxide_______increasingduringthattime.datakepton2.Althoughweareburningcoalinhuge_________everyyear,wewon’t________ofitforcenturies.3.Iftheamountofgreenhousegasescontinuesto_______,wecouldbefacingaglobal__________.quantitiesrunoutbuildupcatastrophe

3、4.Manyscientistsbelievethatglobalwarminghas__________throughtheburningoffossilfuels.comeabout5.The_____________ofarisingsealevelwouldbewidespreadflooding.consequence6.Onthewholethewarmingoftheearthisa____________thatcausesgreatconcern.7.The__________showstemperaturechangesdur

4、ingthe20thcentury.8.Onehectareofforestcanabsorb23tonsofcarbondioxide____year.phenomenongraphper9.Thewashingmachineusestoomuchenergy,but_________webuyamoreeconomicalone,itwouldstillusetoomuchwater.10.Thecaraccidentonthemainroadyesterday___________onedriver’sdeath.evenifresulte

5、din由it引导的强调句结构：Itis(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。Explanation如：原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调主语：Itwasmyfatherwho/thatdidtheexperimentinthelabyesterdayevening．强调宾语：Itwastheexperimentthatmyfatherdidinthelabyesterdayevening．强调时间：Itwasy

6、esterdayeveningthatmyfatherdidtheexperimentinthelab．强调地点：Itwasinthelabthatmyfatherdidtheexperimentyesterdayevening．e.g.Itwasinthatcitythatwemetforthefirsttime．ItwasnotuntilhetoldmethatIknewthetruth．典型例题分析：1)Itwaslastnight____IsawthefilmStarWars．A．whoB．whenC．thatD．whichC答案C强调句

7、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。2)Itistenyears____MissGreenreturnedtoCanada．A．thatB．whenC．sinceD．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Itbe…that还应是一个完整的句子。而本句去掉‘Itis…that,只剩下tenyearsMissGreenreturnedtoCanada不成句。因此本句不是强调句。Itis+时间+s

8、ince...，其中is=hasbeen.1.Itwasthisvillage___Iwasbought.A.whereB.thatC.