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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；跌至食物鏈食物鏈保持平衡保持平衡處于危險狀態(tài)處于危險狀態(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. 在二十世紀初期，野生老虎的數(shù)量大在二十世紀初期，野生老虎的數(shù)量大約是十萬只。約是十萬只。 the number of意為意為“的數(shù)量的數(shù)量”，跟復數(shù)名詞連用作主語時，中心詞是跟復數(shù)名詞連用作主語時，中心詞是number，謂語動詞要用單數(shù)。，謂語動詞要用單數(shù)。 a number of表示表示“許多許多”，相當于，相當于many，修飾可數(shù)名詞復數(shù)。作主語時，修飾可數(shù)名詞復數(shù)。作主語時，謂語動詞用復數(shù)。例如：謂語動詞用復數(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在近幾年，老虎處于瀕臨滅絕的危險中。中。in danger (of)意為意為“處于（處于（）危）危險之中險之中”。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，引導狀語從句，意在句中作連詞，引導狀語從句，意為為“隨著，當隨著，當?shù)臅r候的時候”。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. (對對是重要的是重要的)2. The river is polluted and _ going dry.(處于處于危險中危險中)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