1、Unit 3 Lesson 17 Animals Are Our Friends Save the Tigers century fur symbol courage brave chain n. 世紀世紀 n. （獸類的）毛（獸類的）毛 n. 標志，象征標志，象征 n. 勇氣，膽量勇氣，膽量 adj. 勇敢的，無畏的勇敢的，無畏的 n. 鏈子；鏈條鏈子；鏈條 Words and Expressions balance reason disappear kill cut decrease n. 平衡，平穩(wěn)平衡，平穩(wěn) n. 原因，動機，理由原因，動機，理由 v. 消失，失蹤消失，失蹤 v. 殺死

2、殺死 v. 砍，切，剪，割砍，切，剪，割 v. 使使變小；減少變小；減少 Words and Expressions To know the urgency of protecting tigers To use the following words and expressions correctly: century, courage, brave, reason, kill, cut, at the beginning of, drop to, food chain, in balance, in danger, cut down, as well 1. Where can you us

3、ually see a tiger? 2. Do you think tigers need our help? Why or why not? 3. What can we do to protect wild animals? in a cage? or in the wild? Lets see the video of a report. There are currently six types of tigers: the Bengal tiger, the Siberian tiger, the Sumatran tiger, the Malayan tiger, the Ind

4、ochinese tiger and the South China tiger. the Bengal tiger(孟加拉虎孟加拉虎) the Siberian tiger （東北虎）（東北虎） the Sumatran tiger （蘇門答臘虎）（蘇門答臘虎） the Malayan tiger （馬來亞虎）（馬來亞虎） the Indochinese tiger （印度支那虎）（印度支那虎） the South China tiger （華南虎）（華南虎） Read the lesson and answer the questions. Task 1 1. How many tiger

5、s were there at the beginning of the 20th century? 2. How many tigers are there in the wild today? 3. Where do tigers live? 4. What do tigers look like? 5. What do tigers symbolize? 6. How are tigers described in many stories? 7. What does “at the top of the food chain” mean? 8. What is the reason t

6、igers are important to the environment? 9. Why do people hunt and kill tigers? 10. Aside from their being hunted and killed, what is another reason tigers are disappearing? Reference answer. 1. How many tigers were there at the beginning of the 20th century? Around 100 000. 2. How many tigers are th

7、ere in the wild today? The number has dropped to a few thousand. 3. Where do tigers live? They live in the forests of Asia. 4. What do tigers look like? They usually have orange fur and dark stripes. 5. What do tigers symbolize? They are symbols of strength and courage. 6. How are tigers described i

8、n many stories? They are brave. 7. What does “at the top of the food chain” mean? Tigers are the king of all the wild animals. 8. What is the reason tigers are important to the environment? Because tigers help keep the number of other wild animals in balance. 9. Why do people hunt and kill tigers? T

9、hey are for money. 10. Aside from their being hunted and killed, what is another reason tigers are disappearing? People have cut down a lot of trees as well. As forests disappear, tigers lose their homes. 翻譯下列的短語。翻譯下列的短語。 1.在在之初之初 2.下降到；跌至下降到；跌至 3.食物鏈食物鏈 4.保持平衡保持平衡 5.處于危險狀態(tài)處于危險狀態(tài) 6.把把砍到，減少砍到，減少 7.還，

10、也還，也 at the beginning of drop to food chain in balance in danger cut down as well Task 2 Read the lesson and match each paragraph with its main idea. BCA At the beginning of the 20th century, _ tigers in the wild was around 100000. But today that number _ a few thousand. Tigers are important _ the e

11、nvironment. They help keep the number of other wild animals _. But in recent years, tigers have been in danger of _. Some people _ tigers _ money. We must do something about it. Fill in the blanks and try to retell the text. Task 3 the number of has dropped to in balance disappearinghunt and kill to

12、 for 1. At the beginning of the 20th 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

13、用復數(shù)。謂語動詞用復數(shù)。number前可用前可用large， small等修飾，表示程度。例如：等修飾，表示程度。例如： The number of students in our class is 50. The number of pages in this book is 60. A number of students are planting trees on the hill. 2. But today that number has dropped to a few thousand. 但是現(xiàn)在，數(shù)量已經(jīng)下降到幾千只。但是現(xiàn)在，數(shù)量已經(jīng)下降到幾千只。 a few thousand

14、表示表示“幾千幾千”。當。當 hundred, thousand前面是基數(shù)詞前面是基數(shù)詞one, two, threea few, many時，其后不加時，其后不加s。當。當 hundred和和thousand后面加后面加s時，需要跟時，需要跟of 修飾可數(shù)名詞復數(shù)。例如：修飾可數(shù)名詞復數(shù)。例如： There are three thousand students in our school. Thousands of students are on the square. 3. For this reason, tigers are important to the environment.

15、 因為這個原因，老虎對環(huán)境很重要。因為這個原因，老虎對環(huán)境很重要。 be important to sb./sth. 對對來說是重要的。來說是重要的。 be important for sb./sth. 對于對于來說做來說做是重要的。是重要的。 例如例如: Time is important to me. It is important for you to get there early. 4. 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。

16、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. The sick man is in danger of death. The passengers are in danger! Lets go and help! 5. 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

17、候的時候”。 As the sun rose, the fog disappeared. As she left the room, she remembered that book. Fill in the blanks. 1. _ students is about twenty. (的數(shù)量的數(shù)量) 2. Its _ your health. (對對是重要的是重要的) 3. The river is polluted and _ going dry.(處于處于危險中危險中) The number of important to in danger of 4. _ time went by, she became more and more beautiful. (隨著隨著) 5. _ the party, he gave me a gift. (在在之初之