《Save the Tigers》Animals Are Our Friends PPT下載
第一部分內容：Language knowledge
掌握詞匯：
century,courage,brave,r eason,kill,cut(cut,cut)
接觸詞匯：
fur,symbol,chain,balance,disappear,decrease
短語和句型：
at the beginning of..., drop to, food chain, in danger, cut down, as well
... ... ...
Save the TigersPPT，第二部分內容：vocabulary
century [ˈsentʃərɪ] fur [fɜː] n. 世紀
symbol ['sɪmb(ə)l] n. （獸類的）毛
courage ['kʌrɪdʒ] n. 標志，象征
brave [breɪv] n. 勇氣，膽量 adj. 勇敢的，無畏的
chain [tʃeɪn] n. 鏈子；鏈條
balance ['bæləns] n. 平衡，平穩(wěn)
reason ['riːzn] n. 原因，動機，理由
disappear [dɪsə'pɪə] v. 消失，失蹤
kill [kɪl] v. 殺死
cut [kʌt] v. 砍，切，剪，割
decrease [dɪ'kriːs] v. 使……變�。粶p少
... ... ...
Save the TigersPPT，第三部分內容：Structures and Expressions
at the beginning of..., 在...之初
drop to, 下降到；跌至
food chain, 食物鏈
in balance 保持平衡
in danger, 處于危險狀態(tài)
cut down, 把...砍倒；減少
as well （除某人或某事外）還；也
... ... ...
Save the TigersPPT，第四部分內容：knowledge points
1.At the beginning of (在…之初) the 20th century, the number of (...的數(shù)目，數(shù)量) tigers in the wild was around 100 000 .
at the beginning of... 意為“在...之初”，其后常接表示時間的詞。
例句：我們四月初要去美國。
We're going to USA at the beginning of April.
century n. 世紀
復數(shù)：centuries
第...世紀：the + 序數(shù)詞 + century
例句：這座大樓是19世紀建造的。
The building was built in the 19th century.
在某世紀某年代：in the+年代+of+the+序數(shù)詞+century
例句：我的姐姐出生在20世紀80年代。
My sister was born in the eighties of the twentieth century.
=My sister was born in the 1980s.
the number of 意為“...的數(shù)量”
the number of + 可數(shù)名詞復數(shù)形式。
作主語時謂語動詞要用單數(shù)形式。
例句：房間里的學生數(shù)是43.
The number of the students in the room is 43.
辨析：a number of 表示“若干，很多”,相當于many
a number of + 復數(shù)名詞
例句：許多孩子在公園里。
A number of children are in the park.
... ... ...
Save the TigersPPT，第五部分內容：Try to be excellent！
Fill in the blanks.
1. _____________ students is about twenty. (……的數(shù)量)
2. It’s ____________ your health. (對……是重要的)
3. The river is polluted and ___________ going dry.(處于……危險中)
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 _________. (食物鏈)
7. You know, computers bring troubles _______. (也)
... ... ...
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