仁爱版英语八年级上册_Unit4_Topic1_SectionC.ppt

Look at the pictures:Do you know what they are? Learning aims: 1. Learn some new words and new phrases: cover, thousands of, play an important role in (doing) sth. 2. Learn some useful sentences: Rainforests are very important to us. / Without rainforests, many beautiful plants and animals would die out 3. Go on learning the comparative and superlative degrees of adjectives; Teaching key point 4. Describe natural resources and realize the importance of environment protection. Teaching difficult point Look at the pictures and check which Look at the pictures and check which questions the passage can answer.questions the passage can answer.Then check your guess.Then check your guess.1.What are rainforests?2.How many animals are living in rainforests?3.Where do animals live in rainforests?4.What can we get from rainforests?5.Why are rainforests important to us?Watch the flash of 1a，know something about rainforests. You should underline the key words, phrases and sentences.1aLearning aims: 1. Learn some new words and phrases: cover, thousands of, play an important part in 2. Learn some useful sentences: Rainforests are very important to us. Without rainforests, many beautiful plants and animals would die out 3. Go on learning the comparative and superlative degrees of adjectives; (Important point) 4. Describe natural resources and realize the importance of environment protection. (Difficult point) rainforests in the worldRainforests Rainforests covercover( ( = = spread over spread over ) ) 6%6% of the earthof the earths surface.s surface.Thousands and thousands ofThousands and thousands of animals animals live in rainforests. Many of them livelive in rainforests. Many of them live in in the treesthe trees over 30 meters from the 30 meters from the ground.ground.1. thousands of 成千上万的（数以千计的）成千上万的（数以千计的）类似的表达方式：类似的表达方式： hundreds of 成百上千的（数以百计的）成百上千的（数以百计的） millions of 数以百万计的数以百万计的注意：注意： 表达具体数字时不可使用表达具体数字时不可使用s形式。形式。如：两百本书如：两百本书 two hundred books 用复数形式时常跟用复数形式时常跟of如：数百本书如：数百本书 hundreds of booksLanguage pointsLanguage points2. They play an important part in controlling the climate. 注注：play an important part in 在在.中扮演重要的角色中扮演重要的角色 Friends play an important part in our life.翻译：朋友在我们的生活中扮演着重要的角色.3.But now, rainforests are becoming smaller and smaller1. smaller and smaller 越来越小越来越小 比较级比较级+and+比较级比较级 越来越越来越 如：The weather is colder and colder2. 注意：多音节形容词在表示注意：多音节形容词在表示“越来越越来越”时，常用时，常用 结构是：结构是：more and more +形容词原形形容词原形 如：越来越漂亮如：越来越漂亮 more and more beautifulListen to 1a and complete the table. Then Listen to 1a and complete the table. Then check with your partner.check with your partner.Feature of rainforests1.in the _ parts of the world2._ ground and always _ and _ in them3.cover _ of the earths _ 4.give a home to many beautiful _ and _Importance of rainforests1.make the air _ and _ 2._ the water and keep the water_3. control the _ 4. keep the beauty of _ 5. give us _, _, fruit, _ and so onhotwetdarkhot6%surfaceplantsanimalsfreshercleanerholdcycling climate naturewoodfoodmedicine1bDesign of the passage RainforestsFeatures of rainforestsImportance of rainforestsAllow students to answerAllow students to answerHow to protect the rainforests ?1cRead 1a again and answer the Read 1a again and answer the questions.questions.1. What does the word “cover” mean in Paragraph 1 ?2. Why are rainforests the lungs of the earth ?It means “覆盖覆盖”.Because the plants in the forests help to make the air fresher and cleaner.1cRead again and answer the Read again and answer the questions.questions.3. Why should we protect rainforests well ?4. Can you guess what the next part of the passage will talk about ?Because they help to hold the water and keep the water cycling. They play an important part in controlling the climate.Yes. The next part may talk about what we should do to protect rainforests.Discuss the pictures in groups about Discuss the pictures in groups about how to protect rainforests. how to protect rainforests. show and tell people about do anything we can，such as ask people not to ask people not to cut 1. Learn to describe the situation of rainforests and the importance to the earth.2. Talk about how to protect rainforests.3. useful phrases: thousands of control the climate play an important part in (doing) sth. smaller and smaller Feedback & Consolidation 1. There are about _ students in our school. A. three thousand B.three thousands C.three thousand of2. As summer is coming,the day is becoming _. A.long and long B. longer and longer C.colder and colder3. We should plant more trees because they play an important _ in protecting the environment. A.part B.game C.tape D. sport Are you right ?Homework Write a short passage about how to protect rainforests.You can write like this :Rainforests are very important to us. It is necessary for us to protect them very well. First, we should