(完整版)必修2Unit4词汇学案

Book2 Unit4 Wildlife Protection

Learning Objectives:

1. By filling in the blanks, Ss can know something about the usages of the words ,phrases and sentence patterns.

2. By explaining the key points, Ss can mater the usages of the usages of the words ,phrases and sentence patterns.

Part One: Key Words

1．decrease vt.& vi.减少；(使)变小；或变少n．减少，减小

If their habitat is threatened or they cannot find enough food，their numbers may decrease.(P25) 如果它们的栖息地受到威胁或是它们找不到足够的食物，它们的数量就会减少。

They are making every effort to decrease the production cost.他们正尽力降低生产成本。

There's a decrease in the annual birthrate. 年出生率正在下降。

归纳拓展：①on the decrease在减少中 a decrease in...在……方面减少了

②decrease to...减少到…… decrease by...减少了……decrease from...to...从……减少到……

③on the increase 在增加

The price of wheat _____________________15%. 小麦价格降低了15%。

The mistakes he has made are __________________. 他犯的错误正在减少。

介词填空①There has been some decrease ________ traffic accidents this year.

②To our delight，varieties of birds in the forest are ________ the increase.

2．hunt vt.& vi.打猎；猎取；搜寻

too much hunting in the 1950s (P25) 二十世纪五十年代的过度捕杀

At one time man had to hunt to survive. 从前人类要以打猎为生。

归纳拓展：

hunt for sth.搜索；寻找某物hunt sp.for sb./sth.搜索某地寻找某人/物

hunt after 追逐，追求go hunting去打猎

Many people _____________ fame in their lives but never find it.很多人一生追逐名誉，但是总不能成功。

He's on holiday in Africa，_____________ animals. 他正在非洲度假，打猎呢。

完成句子

①他一直在找工作。He has been ____________ a job.

②他们搜遍树林寻找从动物园里逃出来的狮子。

They ______________ the wood __________ the lion escaping from the zoo.

3．respond vi.回答；响应；做出反应

Daisy responded immediately. “I'd like to see some endangered wildlife，”she said.(P26)戴茜马上回答，她说：“我想去看看一些濒临灭绝的野生动植物。”

I asked her what the time was，but she _____________. 我问她几点了，但她没回答。

①respond to...回应……；对……做出反应respond by doing sth.以某种方式回应

②response n．响应；回答③in response to作为对……的答复/反应(通常作状语)

④ make (no) response to 对……（不）回应/回答

完成句子

①她收到我的信时，给我回了个电话。She ____________ my letter with a phone call.

②这种产品是为了满足顾客的需要而开发的。

The product was developed ________ customers' demand.

③尽管听到了这个问题，他没有做出回应。

In spite of hearing the question，he_____________________ it.

4．relief n．(痛苦或忧虑的)减轻或解除；减轻痛苦的事物；缓解；宽慰

In relief Daisy burst into laughter.(P26) 戴茜如释重负，突然笑了起来。

It was a relief to be able to talk to someone about it.

能和别人谈谈这件事，感到舒心多了。

①relief of/from ……的减轻/消除in relief如释重负；松了口气

to one's relief令人感到欣慰的是

②relieve v t.减轻；缓解；消除relieved adj.宽慰的；不再忧虑的

Hearing the news，he breathed ______________. 听到这个消息，他如释重负地松了口气。

_______________，they all got home safely. 他们都安全地到家了，让我们松了口气。5．mercy n．仁慈；宽恕；怜悯；幸运

Farmers hunted us without mercy.(P26) 农民毫不留情地捕杀我们。

It's a mercy she wasn't seriously hurt. 很幸运她伤得不重。

归纳拓展：

①show mercy to 怜悯某人have mercy on对……表示怜悯