高二英语课件：高二英语Unit4_Language_Points.ppt

Difficult Sentences There is no doubt that the earth is ing warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon. 毫无疑问地球正在变暖,但究竟是人类活动使地球变暖还是它仅仅是一种自然现象,就此引发了激烈的争论。“ There is no doubt … but there is fierce debate ”是主句,是一个并列句; “ There is no doubt ”分句中的“ that the earth is ing warmer ”是同位语从句,作 doubt 的同位语; “ but there is fierce debate ”分句中有两个由 whether 引导的宾语从句。作介词 over 的宾语,第一个宾语从句中又有一个强调句型“ It is … that …”. The increased amount of carbon dioxide means that more heat energy is trapped in the atmosphere causing the global temperature to go up . 二氧化碳量的增加意味着更多的热能滞留在大气中,结果造成地球温度的上升。主句是“ The increased amount of carbon dioxide means ”; that 引导的是宾语从句,其中的分词短语“ causing the global temperature to go up ”作结果状语。 Difficult Sentences On the other hand, there are those , like scientists e Hambley , who believe that we should not worry about high levels of carbon dioxide in the air and that some scientists ’ concerns about global warming are just speculation. 另一方面,有些科学家,如 e Hambley ,认为我们不应该为空气中二氧化碳的含量高担心,他们还认为一些科学家对地球变暖的担心只是一些猜想。主句是“ there are those ”, “ like scientists e Hambley ”是介词短语作定语, “ who believe that …” are just speculation ”是非限制性定语从句,都修饰 those; believe 后有两个宾语从句,都由 that 引导。 on the other hand ,介词短语作状语从句, 修饰全句。 Difficult Sentences****惯句式 There is no doubt that the earth is ing warmer. 毫无疑问地球正在变暖。 There is some doubt whether John e on time. 约翰会不会准时来有些疑问。常用结构: There is no need …没有必要… There is no question …是没有问题的… There is no reason …没有理由… There is no possibility that …是没有可能的… There is no knowing/telling …没法知道/说… It is a wonder that …真奇怪/真是令人吃惊… It is no use/good that … It is no use/good doing sth … 1. ____ was no ____ that he was a fine scholar. A. There; doubt B. It; doubt C. There; wonder D. It; question 2. ____ no knowing what he cou