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1、人教课标版 高二选修6Unit 4Language points1. What do you think green house gases do?你认为温室气体有什么作用呢?本句中think后接了一个由what引导的宾语从句。 但应注意的是：特殊宾语从句即当一般疑问句主句的谓语动词是 think, believe，suppose，consider, imagine，guess和suggest等时，表疑问的词要放在主句前即句首。 例如：正 Who do you think will win in the game?误 Do you think who will win in the game?
2、 当然一般情况下宾语从句的疑问词应放在主句之后，例如：误 Why do you know we cant cut down the big tree?正 Do you know why we cant cut down the big tree?2. So how has this come about and does it matter?考点 come about是不及物短语，意为 “发生”。Please tell me how the accident _. I am still in the dark. (2005 江西)A. came by B. came outC. came to
3、 D. came about得到，获得出来， 露出达到Its already 10 oclock. I wonder how it _ that she was two hours late on such a short trip. (湖北2006) A. came over B. came out C. came about D. came up 点拨 根据句意“已经十点钟了。我不知道 是怎么回事，这么短的路程她迟到了两个 小时。”选C。come over来访；come out 出来，出版；come up出现，到来。3. There is no doubt that the earth i
4、s becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon.There is no doubt that.There is some doubt whether.辨析：主句为肯定句时，doubt后使用 连词whether。主句为否定句时， doubt后则使用连词that。 e.g.:Theres no doubt that one day a cure will be found. There is
5、little doubt that he was the killer.考点1 There is no doubt that .是固定句 型，意为“毫无疑问”，that引导的是 同位语从句，用来进一步补充说明doubt 的具体内容。 考例 Some researchers believe that there is no doubt _ a cure for AIDS will be found. (广东2005) A. which B. that C. what D. whether 点拨 根据固定搭配there is no doubt that .可知选B。考点2 it is . that
6、 .在此句中构成强调句 型，强调的是主语human activity。强调句 型除谓语不能强调外，可强调主语、宾语 或状语。 考例1 It is not who is right but what is right _ is of importance. (重庆2007) A. which B. itC. that D. this 点拨 根据强调句型的判断方法：将it is和 that去掉后，此句成为Not who is right but what is right is of importance，是一个完 整的句子，故此题是一个强调句型。考例2 I dont mind her criti
7、cizing me, but _ is how she does it that I object to. (江西2007) A. itB. thatC. this D. which 点拨 去掉it is和that后，本句相当于., but I object to how she does it，是个完 整的句子。故此句是it强调句型，被强调部分是宾语从句。4. amount of习惯用语：an amount of 相当数量的; 一些any amount (of) 任何数量(的); 大量(的)be of little amount 不重要; 无价值 n. 数量 large amounts of
8、 money 大量的金钱 In an invoice the amount of money should be written both in words and in figures.发票上的钱数要用字和数码写出来。5Without the green house effect, the earth would be about thirty-three degrees Celsius cooler than it is.如果没有温室效应，地球会比现在冷33。这是一个含蓄虚拟条件句 应该注意有时假设的情况并不以条件从句形式表示出来，而是通过一个介词短语或其他方式表示。常用的词或 短语有：w
9、ithout, but for, but that, otherwise, or, but等。 例如：Without your help ( = If we had not had your help), we could not have succeeded要是没有你的帮助，我们是不会成功的。 But for electricity (= If there were no electricity), there would be no modem industry 要是没有电，就不会有现代工业。He was having a meeting with his students; otherw
10、ise he would have come. 他当时正与他的学生进行讨论，否则的话他就来帮我们了。 He felt very tired yesterday, or he would have attended the party他昨天很累, 不然他就参加那个聚会了。6. It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. 翻译 是一位名叫查尔斯奎林的科学家 把1
11、957至1997年期间大气层中二氧化碳的 含量作了精确的统计。 点拨 该句是一个it was . who强调句。a scientist called Charles Keeling是被强调 部分，其中called Charles Keeling为过去 分词短语作后置定语，修饰a scientist。7. result in 导致, 造成 =lead toThe accident resulted in three people being killed. 这一事故导致他的死亡。 The accident resulted in his death.8. On the other hand, t
12、here are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air. 翻译 在另一方面, 还有一些人，对这 一观点持反对态度，像科学家乔治汉 布利，他们认为我们不必担心空气中高 含量的二氧化碳。点拨 该句是一个主从复合句。主句为 there are those，like scientist George Hambley作句子的插入语，who引导的 定语从句修饰those，
13、且在该定语从句中 其谓语动词believe又带有that引导的宾 语从句。句子的主要部分可以表示为: . there are those who believe that . on the other hand: used to give another opinion or fact that should be considered as well as the one you have just given 另一方面also on the one hand. . on the other hand Id like to eat out, but on the other hand I s
14、hould be trying to save money. I want to go to the party, but on the other hand I ought to be studying. 我想去参加聚会，但从另一方面来说，我应该留下来学习。9. consequence in consequence 因此 as a consequence 结果 as a consequence of 由于的结果10. range in /within range 在射程之内 out of / beyond range 在射程之外11. build up Build up the busine
15、ss Sediment (沉淀物)builds up on the ocean floor. This built up my hope after the interview.develop 扩大, 发展 collect 累积, 收集 增加, 支持, 树立12. even if /though: used to emphasize that, although something may happen or may be true, it will not change a situation I wouldnt tell you even if I knew. Even if she survives, shell never fully recover. Even though hes 24 now, hes still like a little child. I can still remember, even though it was so long ago.I. 根据下列各句句意及所给单词的首字母 或汉语提示，写出各单词的正确形式。 1. A large q_ of rice is badly needed here
