1、Unit 3 Environmental ProtectionWe have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.Para.1
2、同位语从句同位语从句There is little doubt that意为“毫无疑问”；相当于There is no doubt that。doubt在句中用作名词。例：1. There is little doubt that smoking is extremely harmful to our health. 2. There is little doubt that John is a gifted diver. 3. There is no doubt that he is a reliable person.1. There is some doubt 意为“有疑问；不确定”，后
3、面接whether从句。2. There is some doubt whether he will come to help us. 1. Theres some doubt whether John will come on time. 2. doubt作动词，表示“怀疑；不信任怀疑；不信任”。在肯定句中，其后通常接 whether/ if 引导的宾语从句，在否定句或疑问句中通常接 that 从句。2. Do you doubt that he will win the match? 1. I doubt if /whether it was what he wanted. We have
4、 known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.Para.1along with 意为“连同；以及；和一起 ”。连接前后两个主语时，谓语
5、动词应和前面的那个主语保持一致。例：1. She came to dinner along with her friends. 2. Jim, along with his classmates, has seen the film. 。 We have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice
6、 and rising sea levels provide evidence of a dramatic change in the global climate.Para.1In 2013, a lot of people were shocked by a news photo of a dead polar bear that was found on Norways Arctic island of Svalbard. According to the scientists who found its dead body, all that remained of the polar
7、 bear was skin and bones. An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died. Experts claimed that low sea-ice levels caused by climate change meant the bear could not hunt seals as before, so it had to travel
8、 greater distances in order to find food. This alarming case showed how the increase in temperature had an impact on Earths ecology.Para.2定语从句定语从句定语从句定语从句定语从句定语从句宾语从句宾语从句过去分词作定语过去分词作定语1. I doubt Tony will accept the invitation. 2. There is little doubt their habitats are being destroyed. 3. The woma
9、n, along with two children, (come) here every day.4. They (shock) by the news that their son needed an operation.5. The presence or absence of clouds can have an impact temperature. 语法填空。语法填空。whether/if考点追击考点追击that comeswere shockedonUnit 3 Environmental ProtectionThen what is causing the increase i
10、n the global average surface temperature? Climate scientists often mention a key climate process called the greenhouse effect, which has two common meanings: the natural greenhouse effect and the man-made greenhouse effect. The natural greenhouse effect refers to the fact that heat from the sun ente
11、rs the atmosphere and warms Earths surface as short-wave radiation. The heat is released back into space at longer wave lengths.Para.3过去分词作定语过去分词作定语定语从句定语从句同位语同位语同位语从句同位语从句1. 谈到；提到2. 参考；查阅3. 指的是例：1. His report refers to the situation in the Middle East. 2. The writer often refers to a dictionary. 3.
12、 The book which you referred to is not in the library.refer to的含义：refer to与point to：refer to 指语言、内容与某人(物)有关;而 point to 表示用手指向某人(物) 。2. She pointed to the map and explained to the students. 1. I didnt know whom she was referring to. Greenhouse gases in the atmosphere, such as methane and carbon dioxi
13、de, trap some of the heat, keeping Earths climate warm and habitable. Without this process, Earth could not sustain life. However, the man-made greenhouse effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trap
14、ped in the atmosphere and causes Earths surface temperature to rise quickly.Para.3谓语谓语动词动词ing作状语作状语形容词作宾补形容词作宾补含蓄条件句含蓄条件句be trapped in意是“被困在; 陷入困境; 陷入” 。例：Linda must be trapped in this storm. If so, she must be in danger. It means that more heat energy tends to be trapped in the atmosphere causing t
15、he global temperature to go up. be caught in 表示“陷入,卷入”；be stuck in 表示“受困于，被困在中， 陷入，卡住不动”。2. We dont want to be stuck in the market all the day.1. We were caught in the storm and got wet all over.Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Ea
16、rths climate warm and habitable. Without this process, Earth could not sustain life. However, the man-made greenhouse effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Eart
17、hs surface temperature to rise quickly.Para.31. your help I could not get there on time.2. He (trap) in the hard task. 3. A friend of mine often referred Dr. Bethune when I was in Canada.4. The cold weather caused the plants (die). 5. The fact he has fully recovered makes me feel good. 语法填空。语法填空。Without考点追击考点追击was trapped toto diethatBye-bye!
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