Unit 2Saving the earth Topic 2 Section A 学案 （含答案）仁爱版九年级上册

Unit 2 Topic 2 Section A
【学习目标】
1.谈论沙尘暴的成因,初步感知不定代词和不定副词的用法。
2.能够从所听材料中获取有效的细节信息,提高听力能力。
3.树立绿色环保意识,关注环境问题。
【预习导学】
一、生词速查
1.　　 n.沙
2.　　conj.虽然,尽管,即使
二、短语速记
1.　　 猛烈地刮
2.　　 沿着大街走
3.　　 砍倒
4.　　转换成;变成
5.　　 阻止
6.　　 刮走
7.　　 冲走
8.　　 绿色长城
9.　　 许多;大量
10.　　 作为结果
11.　　 形成
12.　　 灭绝
13.　　 ……的重要性
三、句子速译
1.什么导致了这些沙尘暴
What 　　 these sandstorms
2.结果,许多富饶的良田变成了沙漠。
As a result, a lot of rich land 　　 　　 desert.
3.树木可以防止风吹走尘土。
Trees can 　　.
4.虽然以前有沙尘暴,但现在我们已经建成了“绿色长城”。
　　there were sandstorms before, now we 　　 “The Green Great Wall”.
四、想一想
预习课本1a,回答下列问题。
1.What's the weather like
______________________________________________________________
2.What caused the sandstorms
______________________________________________________________
3.What are the trees' functions
______________________________________________________________
【答案】
一、
1.sand
2.although
二、
1.blow strongly
2.walk down the street
3.cut down
4.change into
5.stop...from...
6.blow away
7.wash away
8.The Green Great Wall
9.a large number of
10.as a result
11.come into being
12.die out
13.the importance of...
三、
1.causes
2.changed　into
3.stop the wind from blowing the earth away
4.Although　have built
四、
1.It's windy.
2.People cut down too many trees.
3.Trees can stop the wind from blowing the earth away, save the water and stop the water from washing the earth away.
【合作探究】
任务驱动一 复合不定代词练习
用适当的复合不定代词填空。
1.I am hungry.I want 　　 to eat.
2.—Do you want to say 　　for yourself
—No, I have 　　 to say.
3.　　 is ready.We can start now.
4.Why not ask 　　 to help you
5.—The story is so amazing.It's the most interesting story I've ever read.
—But I'm afraid it won't be liked by 　　.
6.Lin Tao is new here, so he doesn't know 　　.
◎学法指导:
不指明替代某个(些)人、某个(些)事物的代词叫不定代词。由some-、 any-、no-、 every-加上-one、-body、-thing连用, 构成复合不定代词。
任务驱动二 听力训练
1.听课本4的录音第一遍, 完成课本4A的活动,即圈出录音中出现的短语,训练获取特殊信息的能力。
圈出的短语有: 　　。
2.听课本4的录音第二遍,独立完成课本4B的活动。
(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.
3.小组讨论环境污染给动物带来怎样的危害。
任务驱动三 小组活动
1.小组谈论沙尘暴是怎样形成的,并且小组之间互相交流合作,理清思路,完成课本3的图片排序练习。(Keys: 　　)
2.结合讨论内容,以“How sandstorms come into being”为题写一篇短文。
【答案】
任务驱动一
1.something
2.anything　nothing
3.Everything
4.someone/somebody
5.everyone/everybody
6.anybody/anyone
任务驱动二
1.destroy the environment, disappear rapidly, enough bamboo to eat
2.(1)fewer　and　fewer　(2)in　danger　of　(3)plenty　of　(4)come　to　understand　(5)do　our　best
任务驱动三
4-1-5-3-6-2
【知识超市】
[命题点一]
●And a lot of water can be saved by forests.并且森林可以贮存大量的水分。
◎观察思考:1.We'll eat some now and save some for tomorrow.我们现在吃一些,然后留一些明天吃。
2.We'll save a lot of time if we go by bus.如果我们乘公交车去可以节省很多时间。
3.He saved his friend's life in the accident.在这次事故中,他挽救了他朋友的生命。
◎用法总结:1.save为动词,意为“贮存;保存”。
2.save意为“节省;节约;避免(金钱、时间、精力等的)浪费”。
3.save意为“救;拯救;挽救”。 save one's life意为“挽救某人的生命”。
对点自测
把下列句子翻译成英语
1.救人是医生的职责。
______________________________________________________________
2.虽然这位老人很富有,但他仍然节约用钱。
______________________________________________________________
3.树能帮助土壤贮存大量水分。
______________________________________________________________
【答案】
1.It's doctors' duty to save patients' lives.
2.Although the old man is rich, he still saves money.
3.Trees can help soil save a lot of water.
[命题点二]
●Although there were sandstorms before, now we have built “The Green Great Wall”.虽然以前有沙尘暴,但现在我们已经建成了“绿色长城”。
◎观察思考:1.Although he was old, he still worked hard.虽然他年龄很大了,但他仍旧努力工作。
2.They are poor, but they are generous.他们很穷,但十分慷慨。
3.He went on working, although/though he was tired.尽管很累,但他还是继续工作。
◎用法总结:1.although是连词,意为“虽然;尽管”,引导让步状语从句。
2.although引导的从句不能与but、however连用,但可与yet、still连用。
3.引导从句时,although可与though互换使用,只是although较正式,though更口语化,使用普遍些。
对点自测
根据句意,用适当的词填空,完成句子
1.　　 it is dark now, the workers go on working there.
2.The woman is nearly ninety, 　　she is still living strongly.
3.Although the students try to clean the classroom, there is 　　 some sand on the floor.
【答案】
1.Although/Though
2.but
3.still
2