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1、LESSON17 SAVE THE TIGERS!THINK ABOUT IT Where can you usually see a tiger?Do you think tigers need our help? Why or why not?1. Master some new words : century, courage, brave, reason, kill, cut. 2. Master some phrases about how to protect animals. 3. Discuss some ways to protect animals.Teaching Aim

2、s:New words在在之初之初下降到；跌至下降到；跌至食物鏈?zhǔn)澄镦湵３制胶獗３制胶馓幱谖ｋU(xiǎn)狀態(tài)處于危險(xiǎn)狀態(tài)的數(shù)量的數(shù)量（除某事或某人外）（除某事或某人外）還，也還，也at the beginning of, drop to, food chain, in balance, in danger, the number of, as wellSave the tigersParagraph 1Paragraph 2Paragraph 3A. Tigers are in danger of going extinct.B. “Save the Tigers” is a volunteer gro

3、up that hopes to stop the tigers from disappearing.C Tigers are important to the environment.BCARead and answer:How many tigers were there at the beginning of the 20th century?Read and Answer: Where do tigers live? Read and Answer: Why do some people hunt and kill tigers?1. At the beginning of the 2

4、0th century, the number of tigers in the wild was around 100 000. 在二十世紀(jì)初期，野生老虎的數(shù)量大在二十世紀(jì)初期，野生老虎的數(shù)量大約是十萬(wàn)只。約是十萬(wàn)只。 the number of意為意為“的數(shù)量的數(shù)量”，跟復(fù)數(shù)名詞連用作主語(yǔ)時(shí)，中心詞是跟復(fù)數(shù)名詞連用作主語(yǔ)時(shí)，中心詞是number，謂語(yǔ)動(dòng)詞要用單數(shù)。，謂語(yǔ)動(dòng)詞要用單數(shù)。 a number of表示表示“許多許多”，相當(dāng)于，相當(dāng)于many，修飾可數(shù)名詞復(fù)數(shù)。作主語(yǔ)時(shí)，修飾可數(shù)名詞復(fù)數(shù)。作主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)。例如：謂語(yǔ)動(dòng)詞用復(fù)數(shù)。例如： The number of stude

5、nts in our class is 50. The number of pages in this book is 60. A number of students are planting trees on the hill.Fill in the blanks.1. _ students is about twenty. (的數(shù)量的數(shù)量)2. _workers in the factory come from the countryside. (許多許多)The number ofA number of3.The number of the students in our class

6、_( be ) fifty.4. A number of students in our class _ (be) from Jiu quan.5. The number of pages in this book _(be) 60.isareis2. In recent years, tigers have been in danger of disappearing. 在近幾年，老虎處于瀕臨滅絕的危險(xiǎn)在近幾年，老虎處于瀕臨滅絕的危險(xiǎn)中。中。in danger (of)意為意為“處于（處于（）危）危險(xiǎn)之中險(xiǎn)之中”。例如。例如Youre in danger of catching a cold

7、.The sick man is in danger of death.The passengers are in danger! Lets go and help!3. As forests disappear, tigers lose their homes.隨著森林的消失，老虎失去了它們的隨著森林的消失，老虎失去了它們的家園。家園。as在句中作連詞，引導(dǎo)狀語(yǔ)從句，意在句中作連詞，引導(dǎo)狀語(yǔ)從句，意為為“隨著，當(dāng)隨著，當(dāng)?shù)臅r(shí)候的時(shí)候”。As the sun rose, the fog disappeared.As she left the room, she remembered that

8、book.Fill in the blanks.1. Its _ your health. (對(duì)對(duì)是重要的是重要的)2. The river is polluted and _ going dry.(處于處于危險(xiǎn)中危險(xiǎn)中)important toin danger of3. _ time went by, she became more and more beautiful. (隨著隨著) 4. _ the party, he gave me a gift. (在在之初之初)5. The temperature has _ below zero. (下降到下降到)6. It is at the bottom of the _. (食食物鏈物鏈)7. You know, computers bring troubles _. (也也)AsAt the beginning ofdropped tofood chainas wellDiscuss with your partners about some ways to protect animals.Summary: What did we learn in this lesson?Homework Write a short passage about how to protect animals.Goodbye