《Save the Tigers》Animals Are Our Friends PPT下载

《Save the Tigers》Animals Are Our Friends PPT下载

第一部分内容：Language knowledge

掌握词汇： 

century,courage,brave,r eason,kill,cut(cut,cut)

接触词汇：

fur,symbol,chain,balance,disappear,decrease

短语和句型：

at the beginning of...,  drop to, food chain, in danger,  cut down,  as well

... ... ...

Save the TigersPPT，第二部分内容：vocabulary

century [ˈsentʃərɪ] fur [fɜː] n. 世纪

symbol ['sɪmb(ə)l] n. （兽类的）毛

courage ['kʌrɪdʒ] n. 标志，象征

brave [breɪv] n. 勇气，胆量 adj. 勇敢的，无畏的

chain [tʃeɪn] n. 链子；链条

balance ['bæləns] n. 平衡，平稳

reason ['riːzn] n. 原因，动机，理由

disappear [dɪsə'pɪə] v. 消失，失踪

kill [kɪl] v. 杀死

cut [kʌt] v. 砍，切，剪，割

decrease [dɪ'kriːs] v. 使……变小；减少

... ... ...

Save the TigersPPT，第三部分内容：Structures and Expressions

at the beginning of...,  在...之初

drop to,   下降到；跌至

food chain,   食物链

in balance   保持平衡

in danger,  处于危险状态

cut down,  把...砍倒；减少

as well  （除某人或某事外）还；也

... ... ...

Save the TigersPPT，第四部分内容：knowledge points

1.At the beginning of (在…之初) the 20th century, the number of (...的数目，数量) tigers in the wild was around 100 000 .

at the beginning of...   意为“在...之初”，其后常接表示时间的词。

例句：我们四月初要去美国。

We're going to USA at the beginning of April.

century   n.    世纪

复数：centuries    

第...世纪：the + 序数词 + century

例句：这座大楼是19世纪建造的。

The building was built in the 19th century.

在某世纪某年代：in the+年代+of+the+序数词+century 

例句：我的姐姐出生在20世纪80年代。

My sister was born in the eighties of the twentieth century.

=My sister was born in the 1980s.

the number of     意为“...的数量”   

the number of + 可数名词复数形式。

作主语时谓语动词要用单数形式。

例句：房间里的学生数是43.

The number of the students in the room is 43.

辨析：a number of 表示“若干，很多”,相当于many

a number of + 复数名词 

例句：许多孩子在公园里。

A number of children are in the park.

... ... ...

Save the TigersPPT，第五部分内容：Try to be excellent！

Fill in the blanks.

1. _____________ students is about twenty. (……的数量)

2. It’s ____________ your health. (对……是重要的)

3. The river is polluted and ___________ going dry.(处于……危险中)

4. _________________ the party, he gave me a gift. (在……之初)

5. The temperature has __________ below zero. (下降到)

6. It is at the bottom of the _________. (食物链)

7. You know, computers bring troubles _______. (也)

... ... ...

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