新冀教版九年级全一册英语Lesson 28 The Study of Living Things课件

1、Lesson 28 The Study of Living ThingsUnit 5 Look into Science 学习目标Curriculum words: Chip Taylor, biology, butterfly, migrate, fantastic, pletelyUseful expressions: Fantastic facts about the butterfly have been drawing Dr. Taylors attention.Here, as many as 230 million butterflies spend the winter.Fun

2、ctions: Master the new words: Chip Taylor, biology, butterfly, migrate, pletely, grandchild, female, milkweed, chemical, puzzling Grammar: almost的用法Sentences: But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.This is both puzzling a

3、nd interesting for many scientists.思 考新课导入思 考Do you like nature, why?新课讲解THINK ABOUT ITWould you like to be a biologist when you grow up？ Why or why not?What mysteries of nature do you know about? Dr. Chip Taylor teaches biology at a university in the United States. He studies one kind of North Amer

4、ican butterfly. Just like a migrating bird，this butterfly travels about 4 000 kilometres south in fall. Fantastic facts about the butterfly have been drawing Dr. Taylors attention.课文呈现新课讲解 In Mexico，the butterflies always return to the same small piece of forest，which is only 20 kilometres wide. Her

5、e, as many as 230 million butterflies spend the winter. They can cover some trees almost pletely. The butterflies that return to the south are the greatgreat grandchildren of the butterflies that left for the north. When they begin to travel north in spring，the females lay eggs. They lay eggs on onl

6、y one plant：milkweed.Butterflies are beautiful. What do you know about them?新课讲解 But in Mexico，people cut down the trees that the butterflies need to rest on because they want more land for farming. In the United States and Canada，farmers use chemicals that kill milkweed. This worries Dr. Taylor a l

7、ot. Now things are improving. Mexico has begun to protect parts of its forests. The United States and Canada have encouraged farmers to use less chemicals.新课讲解 Scientists still dont understand how the butterflies know when to fly south. If they are even a few days late，they will freeze. And how do a

8、ll the greatgreat grandchildren find the same forest in Mexico every year? This is both puzzling and interesting for many scientists. There are many mysteries yet to be discovered by those interested in science. Would you like to study biology?新课讲解Let s Do It !Read the lesson and plete the table.1Fa

9、ntastic facts about butterflies The butterflies always _ to the same small piece of forest and _ the winter there. The butterflies that return to the south are the greatgreat grandchildren of the butterflies that left for the north. The females _ eggs on only one plant：milkweed. return spend lay 新课讲

10、解Things that scientists cant understand How do the butterflies know when to fly south？ How do the greatgreat grandchildren of the butterflies _the same forest？ find Things that Dr. Taylor worries about In Mexico，people cut down the trees that the butterflies need to _on. In the US.and Canada，farmers

11、 use chemicals that _ milkweed. rest kill 新课讲解Join the sentences to make attributive clauses.2Example： We did some experiments yesterday. The experiments were fantastic. The experiments that we did yesterday were fantastic.新课讲解1I asked him to mail the letter. I wrote the letter to my cousin. _2Yeste

12、rday I met a boy. The boy is a new member in our art club. _3Mary was carrying a bag. The bag cost her a lot of money. _ 4Football is a team sport. Football is popular all over the world. _I asked him to mail the letter that I wrote to my cousin. Yesterday I met a boy who is a new member in our art

13、club. Mary was carrying a bag which cost her a lot of money. Football which is popular all over the world is a team sport. 新课讲解3Work in groups of three to play a game.Task tips：Each group should prepare some pieces of paper and divide them into three columns. Student A writes a persons name in the f

14、irst column，folds the paper and passes it to Student BStudent B writes a statement beginning with “who”，folds the paper and passes it to Student CStudent C must finish the sentence and read it out loud.Example：Mr. Brownwho is a biologistwill give us a talk新课讲解 辨析 alive，living与live PointLanguage poin

15、t 1用法 例句 alive 既可指人，也可指物，可作表语或后置定语。 The fish is still alive.这条鱼还活着。living 既可用于指人，也可用于指物。在句中可作表语或定语。 He is dead，but his parents are still living.他死了，但他的父母仍然健在。These are all living fish.这些都是活鱼。 live 主要用于指鸟类或其他动物。 We saw a live snake.我们看见了一条活蛇。 新课讲解 as many as多达，和一 样多PointLanguage points 2as many as修饰可

16、数名词复数。 eg：There are as many as ten thousand birds in the forest. 这个森林里有多达一万只的鸟。 asas和一样。中间用形容词或副词的原级。否定形式中，前面的as也可用so, 即not so/ asas意为“不如”。eg：I think English is as important as Chinese.我认为英语和汉语一样重要。 You arent as/ so tall as your brother.你没有你弟弟高。新课讲解典例Steve isnt as _ as Kelly. He often makes mistakes

17、 in his writing. (浙江丽水)AcarelessBtidyCcareful Ddifficult【点拨】根据句意可知，Steve不如Kelly仔细，他经常在 书写方面犯错误。asas 中间应该用形容词或副词的原级。 故选C。C新课讲解 draw ones attention 引起某人的注意 PointLanguage points 3eg：Its a special day to draw peoples attention to the environment. 它是个引起人们注意环境的特殊日子。pay attention to 注意eg：Pay attention to y

18、our handwriting. 注意你的书写。新课讲解 20 kilometres wide 20千米宽 PointLanguage points 4表示长、宽、高等用“基数词单位词(metre，foot，inch等)形容词(long，wide，high等)”或者用“基数词单位词in名词(length，width，height等)”。eg：The wall is 20 metres long and 2 metres high. The wall is 20 metres in length and 2 metres in height. 这堵墙20米长，2米高。新课讲解 辨析 almost

19、与nearly PointLanguage points 5相同点 不同点 nearly 意思相近，肯定句中可以换用。 nearly可以和not连用，not nearly是“远不”的意思，但almost不和not单独连用。The money will not be nearly enough for my journey.这些钱远不够我旅行用。 almost almost能和never，no，none，nothing，nobody等词连用，这种情况下不能用nearly新课讲解 cut down 砍倒，缩减 PointLanguage points 6eg：They cut down the b

20、ig tree. 他们把这棵大树砍倒了。 Youd better cut the article down to about 500 words. 你最好把这篇文章压缩到五百字左右。新课讲解(1) worry作及物动词，构成结构：worry sb. 使某人担心。eg：I didnt want to worry my friend.我不想使我的朋友担心。(2) worried adj. 担心的 be worried about sb./sth. 担心某人/某事eg：Dont be worried about me. I can look after myself. 不用担心我。我能照顾自己。 w

21、orry /wri/ n.烦恼，忧虑v.担心，担忧 PointLanguage points 7新课讲解(3) worry作不及物动词，常构成：Dont worry. “不要担心。”；worry about sth./sb. “担心某事/某人”。eg：Dont worry. Hell be all right. 别担心。他会平安无事的。 The child has nothing to worry about. 这个孩子没有什么可担心的。新课讲解 both.and, neither.nor与either.or 的区别PointLanguage points 8(1)both.and.表示“和都

22、”，是指两者兼而有之，连接两个并列成分作主语时，谓语动词要用复数形式。(2)neither.nor表示“既不也不”，指两者都不，连接两个并列成分作主语时，谓语动词跟最邻近的主语保持人称和数上的一致。(3)either.or 表示“或者或者”或“不是就是”的意思，是指两者中的一个，它连接两个并列成分作主语时，谓语动词跟最邻近的主语保持人称和数上的一致。当堂小练一、根据句意及汉语提示完成单词1Do you like _ (生物学) at school? 2Look! There are many_ (蝴蝶) among the flowers.3This is a _ (极好的) film.4I

23、_ (完全地) forgot about it.5Many people _ (迁移) to Canada in the 1800s.biology butterflies fantastic pletelymigrated 当堂小练二、单项选择6Our teacher often encourages him _ hard.Awork Bworking Cto work Dworks7Since environment is too important to all of us, we human beings had better _ fewer trees. Aturned down Bcut down Cput down Dcut upCB新课讲解8Look! My dog is _ on the ground in the sun. Alie Blay Claid Dlying9(呼和浩