Unit 5 Lesson 28 The Study of Living Things 学案（含答案）冀教版九年级全一册

Unit 5 Lesson 28 The Study of Living Things
【学习目标】
1.通过基础练习,能记住并正确使用本课时的重点单词和重点短语。
2.通过阅读训练本课时的内容,了解蝴蝶的生活习性。
3.通过任务驱动中的游戏,能够用英语表达大自然的一些奥秘。
【预习导学】
一、单词速记
1.奇普·泰勒 　 　
2.生物学;生物　 　
3.蝴蝶　 　
4.移居;迁徙　 　
5.奇异的;了不起的;极好的　 　
6.完全地　 　
7.孙子;孙女;外孙;外孙女　 　
8.雌性的动物或植物;女子　 　
9.(植)马利筋　 　
10.化学物质　 　
11.令人费解的　 　
二、短语速记
三、想一想
1.文中提到什么引起泰勒博士的注意
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2.雌性蝴蝶只在什么植物上产卵
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【答案】
一、
1.Chip Taylor　2.biology　3.butterfly　4.migrate　5.fantastic　6.completely　7.grandchild　8.female　9.milkweed　10.chemical　11.puzzling
二、
三、
1. Fantastic facts about the butterfly.
2.They lay eggs on only one plant: milkweed.
【合作探究】
任务驱动一 单词大闯关
1.齐读本课重点单词。
2.用方框内所给单词的适当形式填空。
puzzle　fantastic　complete
grandchild　biology
(1)He was 　 　 wrong this time. He should say sorry to us.
(2)　 　 is my favourite subject.
(3)The old woman has three 　 　. She loves them very much.
(4)The strange man always tells us some 　 　 things which we can't understand.
(5)It's such a 　 　 problem that nobody can solve it.
任务驱动二 阅读训练
1.Read the lesson. Pay attention to pronunciation and comprehension.
2.Show Let's Do It! 1. Read the lesson and complete the table.
任务驱动三 定语从句的含义和用法
1.观察并总结。
◎例句观察:
(1)I asked him to mail the letter that I wrote to my cousin.
(2)Yesterday I met a boy who is a new member in our art club.
(3)Mary was carrying a bag that cost her a lot of money.
◎归纳总结:
定语从句在复合句中作　 　,修饰主句中的名词或代词,被修饰的名词或代词称为　 　。定语从句常位于先行词之后,由关系词引导。如果先行词是　 　,可用who/that来引导;若先行词是　 　,可用which/that来引导。
2.Join the sentences to make attributive clauses.
(1)I like the dog. My father bought a dog for me yesterday.
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(2)I helped a boy just now. A boy fell into ariver.
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3.Work 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 person's name in the first column, folds the paper and passes it to Student B.Student B writes a statement beginning with “who”, folds the paper and passes it to Student C.Student C must finish the sentence and read it out loud.
Example:
Mr. Brown who is a biologist will give us a talk.
【答案】
任务驱动一
2.(1)completely　(2)Biology　(3)grandchildren　(4)fantastic　(5)puzzling
任务驱动三
归纳总结
定语　先行词　人　物
2.(1)I like the dog that my father bought for me yesterday.
(2)I helped a boy who fell into a river just now.
【知识超市】
[命题点一]Here, as many as 230 million butterflies spend the winter. 多达两亿三千万只蝴蝶在这里过冬。 　
as many as 意为“多达……; 和……一样多”, 修饰可数名词复数。当as... as...与表示重量、数量、时间、距离、价格等的计量名词连用时,往往并不表示比较,而是构成一个形容词组,意为“重达……” “多达……” “高达……”等。如:
The river is as deep as 10 metres. 这条河深达10 米。
◎拓展:
1.as...as 意为“和……一样”,中间用形容词或副词原形, 表示同级的比较。如:
English words can be as short as one letter. 英语单词可以短到只有一个字母。
Your pen writes as well as mine. 你的钢笔书写起来和我的一样流畅。
2.not as/so + adj. /adv. +as意为“不如……”。如:
This dictionary is not as/so useful as you think. 这本词典不如你想象的那样有用。
◎温馨提示:
在as...as结构中, 要使用形容词或副词的原形; as...as既可用于肯定句也可用于否定句; so...as只用于否定句。
对点自测
同义句转换。
1.Ben is 1.65 metres tall. Jina is 1.65 metres tall, too.
Ben is 　 　 　 　 　 　 Jina.
2.English is not as difficult as physics.
English is 　 　 　 　 than physics.
Physics is 　 　 　 　 than English.
【答案】
1.as　tall　as
2.less　difficult　more　difficult
[命题点二]But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming. 但是在墨西哥, 人们砍伐了蝴蝶赖以栖息的树木, 因为他们需要更多的耕地。 　
cut down意为“砍伐,砍倒”,动副短语,若宾语为代词,放在cut和down之间。如:
It is harmful to the environment to cut down the trees. 砍倒那些树木对环境有害。
◎拓展:
1.cut down 还有“削减”的意思。
We must cut our expenses down in order to live through the whole year. 我们必须减少消费, 以便度过全年。
2.与cut 有关的短语
cut...into 把……切成　cut off 切断,断绝
cut out 删除,停止做(或使用、食用)
cut up 切碎　cut in 插嘴
对点自测
单项选择。
( )1.We should protect the forest and forbid (禁止) people to 　　　　so many trees.
A.cut off B.cut down C.cut in D.cut out
( )2.You need to take good care of those trees instead of 　　　　.
A.cutting down them B.cutting them down C.cut down them D.cut them down
( )3.Don't 　　　　when other people are saying something.
A.cut off B.cut out C.cut in D.cut down
【答案】
1.B　2.B　3.C
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