U4P2 全球变暖 Reading.pptVIP

Is greenhouse effect good or bad? The greenhouse effect is extremely important in maintaining the temperature of the earth. Without it, the earth would not be warm enough to support human life. On the other hand, if the greenhouse effect becomes too strong, the global temperature will go up. Discussion Careful reading 重难点句式分析 毫无疑问，地球正在变暖，而地球变暖正是人类活动导致的，并非是一种无规律的自然现象。 同位语从句 doubt后面跟了两个由that引导的同位语从句，并且第二个同位语从句中用到了强调句型。 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. 1. 毫无疑问你会成功。 There is no doubt that you will succeed. 2. It is not how much you read but what you read that counts. 重要的不是你读了多少，而是你读了 什么。 Translation On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be a catastrophe. 一方面，福特斯博士认为气温升高5度的趋势可能是一场大灾难。 宾语从句 定语从句 prep. 表示程度、数量 on the one hand…, on the other hand …一方面……，另一方面…… 1. On?the?one?hand?I?admire?his?gifts,? but?on?the?other?I?distrust?his?judgment. 一方面我羡慕他的才华，?而另一方面 我却怀疑他的判断力。 2. 最后他到达一个完全与世隔绝的孤岛。 Finally he reached a lonely island which was completely cut off from the outside world. Translation Find the sentences with it is …that/who… Human activity has caused this global warming. It is human activity that has caused this global warming. What’s the difference? Why is “it is …that” used in the second sentence? We use “it is …that” to give more emphasis to the underlined part. “No one knows the effects of global warming. Does that mean we should do nothing? Or, are the risks too great?” What do these sentences mean? Discuss it with your partners. Discussion Of course we should do something. No matter where global warming will lead us to, we must do something to protect the environment and our only planet. It is believed that the earth is __________ ________and that it is human activity ____ has caused this global warming ___________ a random