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1、 Lesson 17:Save the Tigers1)the number of2)balance的用法的用法3)danger的用法的用法I.Learning aims:Master the new words:century,fur,symbol,courage,brave,chain,balance,reason,disappear,kill,cut,decreaseII.Learning important and difficult points:New Wordscentury fursymbol couragebrave chainbalance reason disappear
2、 killcut decreaseThink About ItlWhere can you usually see a tiger?lDo you think tigers need our help?Why or why not?1.At the beginning of the 20th century,the number of tigers in the wild was around 100 000.在二十世紀(jì)初期,野生老在二十世紀(jì)初期,野生老虎的數(shù)量大約是十萬。虎的數(shù)量大約是十萬。the number of是固定短語,意為“的數(shù)量”,后接可數(shù)名詞復(fù)數(shù),但中心詞是number,所以謂
3、語動詞要用單數(shù)。如:The number of students in our school has grown from 1,000 to more than 1,500.a number of為量詞短語,意為“許多;大量”,相當(dāng)于a lot of或lots of,中心詞是該短語所修飾的可數(shù)名詞復(fù)數(shù),所以作主語時,謂語動詞用復(fù)數(shù)形式。如:A number of students like playing computer games.2.It helps keep the number of other wild animals in balance.它可以幫助保持其他野生它可以幫助保持其他
4、野生動物的數(shù)量平衡。動物的數(shù)量平衡。balance 在句中用作名詞,意為“平衡;均衡”,常用短語be out of balance,意為“不平衡”;keep in balance意為“保持平衡”;balance還作動詞,表示“(使)平衡;(使)均衡”。如:You must learn to keep your balance in skating.在滑冰時你必須要學(xué)會保持平衡。3.In recent years,tigers have been in danger of disappearing.近年來,老虎近年來,老虎已經(jīng)面臨消失的危險。已經(jīng)面臨消失的危險。danger意為意為“危險危險”,
5、通常是不可,通常是不可數(shù)名詞,表示做某事的危險或發(fā)生某數(shù)名詞,表示做某事的危險或發(fā)生某情況的危險等,常用短語情況的危險等,常用短語 be in danger(of),意為,意為“在危險中在危險中”。如:如:Is there any danger of fire?有發(fā)生有發(fā)生火災(zāi)的的危險嗎?火災(zāi)的的危險嗎?1._(長頸鹿)are the tallest animals on land.2.What beautiful _(婚禮)clothes they are!3.Uncle Yan visited many _(亞洲的)countries last year.4.He is intereste
6、d in _(歷史).history I.根據(jù)句意及所給漢語提示,完成下列句子。根據(jù)句意及所給漢語提示,完成下列句子。GiraffesweddingAsian1.One of the worlds biggest zoos _(be)in Egypt.2.My pet dog _(die)two weeks ago.3._(bar)keep the animals inside.4.They got _(marry)on August,8th 2008.5.The Siberian tiger is the _(big)cat(貓科動物)in the world.biggest II.用所給單
7、詞的適當(dāng)形式填空。用所給單詞的適當(dāng)形式填空。isdiedBarsmarried1.Nobody else wants to go to the village.(改為同義句)_ _ _ want to go to the village.2.Liu Yang kept two dogs.(改為否定句)Liu Yang _ _ two dogs.3.Those zoos have ten pandas.(改為同義句)_ _ ten pandas in those zoos.There are III.句型轉(zhuǎn)換,每空一詞。句型轉(zhuǎn)換,每空一詞。No other peopledidnt keepWork in groups and discuss some ways we can protect animals.Write down your ideas.