仁爱英语九年级上Unit2Topic2SectionA.ppt

Unit 2 Saving the EarthTopic2 All these problems are very serious.Section ASection A学习目标学习目标1.通过用具体的事例来学习谈论环境污染给通过用具体的事例来学习谈论环境污染给人类带来的具体危害人类带来的具体危害2.通过学习，我们会更加加深对环境问题的通过学习，我们会更加加深对环境问题的认识，进一步提高我们的环保意识认识，进一步提高我们的环保意识3.初识不定代词和副词的用法初识不定代词和副词的用法pollutionmany trees cut downforests gonewash the earth away冲走冲走change into desert = turn ...into...转换成，变成转换成，变成沙漠沙漠e.g. A lot of rich land has changed into desert because people have cut down too many trees.  sandstormscome into being n. 沙尘暴沙尘暴1a Listen, look and say. Listen and answer the questions 1.What’s the weather like today ? It’s bad. The wind is so strong . And the sand really hurts face.2.What causes these sandstorms ? People have cut down too many trees. As a result, a lot of rich land has changed into desert. 3.Do we still need to do something to protect the environment ? Yes, we do. Although we have built “The Green Great Wall”, we still need to do something to protect the environment . conj. 虽然，尽管，即使n.沙沙The boy and girls are talking about —————.A.different types of sandstorms B.the reasons for sandstorms C.sandstorms in different cities 1b Listen to 1a and choose the best answer.Focus on the main idea of the conversation when you listen for the first time.√1c Read 1a and complete trees’ functions. A.Trees can stop the wind from blowing the earth away. B.A lot of water can be saved by forests. C.They can also stop the water from washing the earth away. Tree’s functions 2 Complete the sentences with the correct forms of the given phrases in the box. as a result, change into, do something, stop…from, blow…away 1.People have cut down such a large number of trees that the land _____________________desert. 2.There are fewer trees left, so the wind always _______ the earth ________. 3.Air pollution has become a serious problem, so we must ______________ to reduce it. 4.we should try our best to _________ people ________ cutting down the trees. 5.In the future, human beings can protect the trees well. _____________, animals will live a happy life in the forest. has changed intoblows awaydo somethingstopfromAs a result3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in groups.( )( )( )( )( )( )( )( )( )( )( )( )415362wash the earth awaymany treeschange into desertforests gonesandstorms come into beingcut down trees4 A. Listen to the passage and circle the phrases you hear. •become weaker•destroy the environment•disappear rapidly •on the earth•enough bamboo to eat4 B. Listen again and fill in the blanks.1. Now some kinds of animals are becoming ______ ______ _______.2. Some animals are_____ ______ ____dying out completely.3. In the past, pandas lived a quiet life and had ________ ______food.4. Humans have _____ _____ __________ the importance of protecting animals.5. We should ______ ______ ____to protect them.do our bestin danger ofplenty ofcome to understandfewer and fewer1.I have ____ to tell you.1.I have ____ to tell you.A. important somethingA. important somethingB. something importantB. something importantB形容词修饰不定代词和不定副词时，要放在不定代词形容词修饰不定代词和不定副词时，要放在不定代词形容词修饰不定代词和不定副词时，要放在不定代词形容词修饰不定代词和不定副词时，要放在不定代词/ /不定副词之后不定副词之后不定副词之后不定副词之后Do you know?2.Everybody ___ ready for the match.2.Everybody ___ ready for the match.A. is B. areA. is B. areA不定代词作主语时，谓语动词要用单数。

不定代词作主语时，谓语动词要用单数不定代词作主语时，谓语动词要用单数不定代词作主语时，谓语动词要用单数 somebody, someone, something, somewheresomebody, someone, something, somewhere anybody, anyone, anything, anywhere anybody, anyone, anything, anywhere none, nobody, nothing, nowhere none, nobody, nothing, nowhere everybody, everyone, everything, everywhere everybody, everyone, everything, everywhere一般情况下用于肯定句一般情况下用于肯定句一般情况下用于肯定句一般情况下用于肯定句一般情况下用于否定句和疑问句一般情况下用于否定句和疑问句一般情况下用于否定句和疑问句一般情况下用于否定句和疑问句表否定含义表否定含义表否定含义表否定含义可用于各种句式可用于各种句式可用于各种句式可用于各种句式the indefinite the indefinite pronoun and adverbpronoun and adverb 1.Lily, would you like ___________ to drink? 2.Cindy is very busy now. She needs _______ to help her. 3.Is there _________ wrong with your computer?4.Jim looked for his pencil-box ____________ , but he didn’t find it. 5.I stayed at home last week. I didn’t go __________. Use someone, something, anything, somewhere, anywhere to fill in the blanks.something someone anythingsomewhereanywhere We learn: 1.Some words: sand, although 2.Some phrases: change into, human being 3.Some sentences: (1)As a result, a lot of rich land has changed into desert. (2)Trees can stop the wind from blowing the earth away.We can: 1. Use the indefinite pronoun and adverb. 2.Talk about the sandstorm and its harm.Summary1.Read 1a.2.Memorize the useful expressions and key sentences which we learn today.3.Finish Section A in your workbook.4.Preview Section B.Thank you!。