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1、选修六第四单元Global warming知识重点总结一 重点短语：e out-发生 2.subscribe to-同意 3. greenhouse effect-温室效应4. in the atmosphere-在大气中 5.huge quantities of .-大量的 6.tend to-趋于 tend towards.-有.的趋势 7.go up-上升 含有go的短语：go ahead-开始， go over-复习，go through-浏览 go against-违背， 8.result in-导致 result from-由于. 9.lead to-导致 10.be oppose
2、d to.反对 11.build up-集结 12.keep on-继续 13.decades or centuries-几十或几世纪 14.on behalf of.-代表.一方 15. have effect on-对.有影响 16.put up with-忍受 put的短语：put aside-节省，put off-推迟put forward-提出建议 17.so long as-只要 18.turn up- 出现19. make.from.-用.做. 20.fossil fuel-化石燃料 21.in floods of tears-泪如雨下22. at random-任意地 23.i
3、n disagreement with-与.意见不合 24.make a contribution to.-为.作贡献 25.present sb. With sth.-赠予某人某物 give a presentation-作报告 26. set the trend-开创潮流 27.in consequence=as a consequence 结果 in consequence of=as a consequence-由于 28.glance at-浏览 glance round-环视 29. an average of-平均为. on average-平均地 up to average-达
4、到平均 30. advocate doing sth.-提倡做某事 31.on the whole-大体上=in general as a whole-总体上 31. keep on-继续 keep的其它短语：keep off-防止，keep .out of-使.不进入 keep to-固守 keep up with-跟上 32.in an.state.-处于.状态 33.stare at-盯着看 34. There is no doubt that.-毫无疑问 35.so long as-只要 36.carry out-执行 37. under the circumstances-绝不 un
5、der no circumstances-既然如此 二 重点句型：1.There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon.-并列同位语-There is no doubt.-毫无疑问There is some doubt whether.-是否.值得怀疑2. It means that more heat energy ten
6、ds to be trapped in the atmosphere causing the global temperature to go up.-宾从中现在分词短语作结果状语3. We cant predict that climate well enough to know to expect, but it could be very serious.-疑问词+不定式作主语或宾语或表语相当于句中名词 As Im not sure where to start with my project, I would appreciate any suggestions you may hav
7、e.4. It takes time/energy/imagination/patience/effect. to do sth.-为了做成某事需要花费时间/精力/想象力/耐力/努力. It takes a lot of energy to make things from new materials, so, if you can, buy things made from recycled materials.5. It was a scientist called Charles Keeling who made accurate measurements of the amount o
8、f carbon dioxide in the atmosphere from 1957 to 1997.6. We do not have to put up with the pollution.7. On the whole the warming of the earth is a phenomenon that causes great concern.-总体上，地球变暖是一种引起人们广泛关注的现象。三 重点语法 ：it的特殊用法：it用于强调句，是为了对句中某一信息内容进行突出或强调而采取的一种句式。1.强调句型：It is/was+被强调部分+that +其他部分，一般情况下被强
9、调部分指人且作主语时，可用who代替that,强调部分指人且作主语时，可用who代替that.强调句型可强调句子的主语、宾语或状语。It was the culture, rather than the language, that made it hard for him to adapt to the new environment abroad.-强调主语It was because I havent been able to be outdoors for so long that Ive grown so crazy about everything to do with natur
10、al.-强调原因2. 强调句型的几种结构： 1）一般疑问句形式：Is/Was it +被强调的部分+that+其他部分 ？Was it because Jack came late for school that Mr Smith got angry ?2) 特殊疑问句形式：疑问词+is/was+it+that+其他部分？How was it that he managed to get the information ?3) 强调句型用于名词从句中，当有疑问词引导的强调结构在句中作名词性从句时，从句必须使用陈述句语序。如：I just wonder what it is that makes
11、 him so excited.4) 含有not.until.的强调句形式：It is/was not until +被强调部分+that+其它部分。It was not until the early 19th century that his musical gift was fully recognized.3. 强调句与从句的辨析：判断是否是强调句，可采用“还原法”：去掉It is/was和that后，句子结构依然完整，就是强调句，否则，就按复合句分析。It was 80 years before Christopher Columbus crossed the Atlantic th
12、at Zhang He had sailed to East Africa.4. 易于强调句混淆的固定句式：1）It is/has been+时间段+since.-自从.以来已经有一段时间了2） It is the first .time that sb. /sth. Had done.-这是。第几次.3） It is high time that. should do sth.-到某人做事的时候4） It was 时间段+before .-过了一段时间才.It was not .时间段+before.-，很快/不久就.It was three years before he came bac
13、k.-过了三年他才回来。5） It is/was+时间点+when.-当.的时候，时间是.It was ten oclock when we got home last night.6）It is+地点名词+where.-是.的地方（where引导定语从句）It was this house where I was born.-这是我出生的房子。5. 需要牢记的含有it的固定表达：as it is-按现状， make it-做到， take it easy-从容，cant help it-没办法，情不自禁，its up to sb.-取决于某人，its a pleasure-不客气2学科网（北京）股份有限公司