Unit 2 Saving the earth. Topic 2 复习课件 2025-2026学年仁爱科普版（2012）九年级英语上册

Review of Unit 2, Topic 2 Learning objects By the end of the class, you will be able to : 3.Write a passage about how to protect and save water. 2. Talk about the causes of the environmental problems. 1. Know about the environmental problems. what why how What environmental problems are there on the earth ? what Part 1 environmental problems Why are there so many environmental problems ? why Part 2 Have paper and a pen ready . Fill in the blanks. All over the world , people have ___________(砍倒） millions of trees.Now there are ____________ (few) trees than before. When it ________ ( rain ) or when the wind __________ (blow ), the earth is __________ (带走）. Forests have become _____________ ( /ˈdezərts ]/),so many kinds of animals and plants are _______________ (appear ). And in some cities, ________________ often come into being. What do you think of cutting down trees ? be, harmful Cutting down trees is harmful to the environment. cut down fewer rains blows taken away deserts disappearing sandstorms functions of trees ...stop the wind from... ...stop the water from... ... can be saved by ... 阻止某人做某事 stop / prevent sb. (from ) doing sth. keep sb. from doing sth. 吹走 blow away 冲走 wash away 我们必须要阻止他过度玩电脑游戏。 We must ________________________________ computer games too much. stop him from playing In big cities, traffic __________ (pollute ) is very serious. Cars and buses have ____________ (pollute) the air. Now many people in cities have _________ problems. _________ (factory ) have also polluted the land and the water. ____________________ (结果是）， many rivers and lakes are now __________( /ded/). pollution polluted health ( breathing ) Factories As a result dead Ozone is a __________ kind of oxygen. It is important to the earth. But now air pollution is ____________ (破坏） it and making a very big _________( /həʊl/) in the ozone layer.Too much ________ (harm ) radiation from the sun passes through the hole and _______ (reach ) the earth ________ (direct ).This kind of radiation can cause ___________( /ˈkænsə/ ). special destroying hole harmful reaches directly cancer Carbon dioxide in the air has __________ (increase) a lot. It _________(main) comes from burning oil, coal and wood. This has formed a ______________(/ˈblæŋkɪt/) around the earth. The heat from the sun can't _____________ (/ɪˈskeɪp/), so the temperature is _________ (rise ). This is called "the greenhouse_________". It causes_______________________________ (海平线 上升） and _________________________________ (全球气候变化）. 导致某人做某事 cause sb. to do sth. 吃太多垃圾食品会导致你变胖。 Eating too much junk food can cause you to become fat. increased mainly blanket escape rising effect the level of the ocean to rise the climate of the earth to change Although the world is hungry, it is even ___________ (饥渴的）.While nearly 3/4 of the earth__________________________(覆盖着）water, we ______ still__________________ (缺少） drinking water. This is because 97% of the earth is ______ (/siː/) water. ___________we can't use it for ________ (water) plants or drinking directly. Humans can only drink and use _________ ( /freʃ/) water from places _____________ （包括） rivers, lakes and underground.Besides, water pollution is very serious ,and lots of people ___________ (浪费） water. thirstier is covered with are short of sea So watering fresh including waste The earth is crying for help. How can we protect the environment? Part 3 how Do you know what behavior is good for the environment and what is bad ? Play a game. Ask and answer in pairs: A: What should we do to protect the environment? B: We should... We shouldn't... A: You're right.Let's ... plant more trees care for wild animals pick up the litter protect and save water ... ... pick flowers throw litter around walk on grass spit ... in public leave rubbish here and there ... ... In Ningde, people are short of water these days. My dear friends, Water is very important to human beings. _____________________________ Let’s do something to protect and save it. First, ________ . Second,_________. Third, _________. Let’s try our best to save water and our planet. _____________ Writing : 由于连续缺水，物业号召所有小区居住者节约用水。 由于你们小区居住着一些外国友人，所以物业请你帮忙用英语 写一份倡议书。四人小组合作，写出一份倡议书。 My dear friends, Water is very important to human beings. We need water to cook and to clean. Without water,plants and animals can't live. Let’s do something to protect and save it. First, we should protect our water resources and not pollute them. The government should also pass laws against the water pollution. Second, we should save water in our daily life, turn off the taps in time, take a shower instead of a bath, and always remember to collect and reuse water. Third, let’s try to spread the message about protecting and saving water. Make more people around us know the problem of water shortage and how to help solve it. Let’s try our best to save water and our planet. Student Union You can write it like this. Remember , we have only one earth. Let's do everything we can to protect it. Grammar: Indefinite Pronoun and Adverb. 不定代词和不定副词 1. 不定代词： 指人：someone/somebody anyone/anybody no one/nobody everyone/everybody 指物：something anything nothing everything 2. 不定副词： 指地点：somewhere anywhere nowhere everywhere 一般用法 ⑴some-复合代词/副词常用于肯定句； e. g. __________________________in the room just now. “我刚刚看见房间里有人。” ⑵any-复合代词/副词常用于否定句或疑问句； e. g. He hasn’t gone ___________________for his holiday. “他没去暖和的地方度假。” I saw someone/somebody anywhere warm ⑶no-复合代词/副词表全否定； e. g. ________________in the woods. “树林里没有什么东西。” ⑷every-复合代词/副词代替全部； e. g. _____________________________ “大家都在这儿。” There is nothing Everyone/Everybody is here. 特殊用法 ⑴some-复合代词/副词用于疑问句中时，表希望得到对方的肯定回答或表请求； e. g. _______________________________________ “你要点喝的东西吗？” ⑵any-复合代词/副词用于肯定句时，表“任何”； e. g. _________________________________, they should be punished. “如果人们在任何公共场所吐痰，他们应当受罚。” Would/Do you like something to drink? If people spit anywhere in public ⑶不定代词作主语时，谓语动词用单数形式； e. g. __________________________________ “一切进展顺利。” ⑷如果有定语修饰，定语应放在不定代词或不定副词后； e. g. _______________________________________ “我有重要的事告诉你。” ⑸no= not any nobody = not anybody nothing = not anything e. g. She didn’t say anything. = ______________________ “她什么也没说。” Everything goes well. I have something important to tell you. She said nothing. 几组在用法上容易混淆的不定代词 1. 【辨析】another和other another 三个或三个以上中的另一个。 other 后面接名词，泛指“别的、其他的”。 another 三者或三者以上的另一个 e. g. ⑴I suggested a camping holiday, but Jenny had _________ ideas. “我建议野外露营度假, 但Jenny有别的主意。” ⑵I don’t want this coat. Please show me _________. “我不要这件大衣。请给我看看其他的。” other another 2. 【辨析】the other, others和the others the other 特指两个中的另一个；还可修饰名词，特指另一些。 others 泛指其他的人或物，等于“other+名词”。 the others 特指确定范围内剩下的全部人或物。 e. g. ⑴There are fifty students in our class. Twenty of them are girls, ______________ are boys. the others the other 特指两个中的另一个；还可修饰名词，特指另一些 ⑵Tom likes swimming, and __________ boys in his class like swimming, too. ⑶He has two sons. One is a worker, ___________ is a doctor. ⑷He often helps _________. the other the other others 3. 【辨析】all和none ⑴all意为“全部，都”，表示三者或三者以上。 ⑵none意为“没有”，表示三者或三者以上都不，后常跟介词of，谓语动词用单、复数均可。 e. g. ①_________ of us is/are afraid of dogs. “我们都不怕狗。” ② We are _________ from Canada. “我们都来自加拿大。” None all Homework 1.Review the day's lesson. Get ready for a dictation. 2. Finish the exercise paper. Lavf57.62.100 $$