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1、Lesson 17Lesson 17Save the TigersSave the Tigers 西坡中學(xué):西坡中學(xué): 李李 江江centuryfursymbolcouragebravechainn. 世紀(jì)世紀(jì)n. (獸類的)毛(獸類的)毛n. 標(biāo)志,象征標(biāo)志,象征n. 勇氣,膽量勇氣,膽量adj. 勇敢的,無(wú)畏的勇敢的,無(wú)畏的n. 鏈子;鏈條鏈子;鏈條Words and expressionsU3L17Wor.mp3balancereasondisappearkillcutdecreasen. 平衡,平穩(wěn)平衡,平穩(wěn)n. 原因,動(dòng)機(jī),理由原因,動(dòng)機(jī),理由v. 消失,失蹤消失,失蹤v. 殺死殺死

2、v. 砍,切,剪,割砍,切,剪,割v. 使使變?。粶p少變?。粶p少Words and expressionsTo use the following words century, courage, brave, reason, kill, cut。 了解一些介紹保護(hù)動(dòng)物的句式。了解一些介紹保護(hù)動(dòng)物的句式。教學(xué)目標(biāo)教學(xué)目標(biāo)1、分析文章,理解中心思想、分析文章,理解中心思想2、掌握一些與保護(hù)動(dòng)物有關(guān)的詞匯并了解保護(hù)動(dòng)物的方法。、掌握一些與保護(hù)動(dòng)物有關(guān)的詞匯并了解保護(hù)動(dòng)物的方法。3、掌握以下介紹保護(hù)動(dòng)物的句式:、掌握以下介紹保護(hù)動(dòng)物的句式:(1) These volunteers hope to sa

3、ve the tigers of the world. (2) At the beginning of the 20th century, the number of tiger in the wild was around 100 000 (3)The tiger is at the top of the food chain (4)As forests disappear, tigers lose their homes.重點(diǎn)難點(diǎn)重點(diǎn)難點(diǎn) 1. 在在之初之初 2. 的數(shù)量的數(shù)量 3.下降到下降到;跌至跌至 4. 食物鏈?zhǔn)澄镦?5. in balance 6. in danger 7. as

4、 well 8. cut down L17.mp3聽并聽并 找一找找一找Read the lesson and answer the questions.1. How many tigers were there at the beginning of the 20th century? Around 100 000.2. How many tigers are there in the wild today? The number has dropped to a few thousand.3. Where do tigers live? They live in the forests o

5、f 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 in many stories?They are brave.7. What does “at the top of the food chain” mean?Tigers are the king of all the wild animal

6、s.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?They are for money.10. Aside from their being hunted and killed, what is another reason tigers are disappearing?People have cut d

7、own a lot of trees as well. As forests disappear, tigers lose the homes.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),謂語(yǔ)動(dòng)詞跟復(fù)數(shù)名詞連用作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞要用單數(shù)。要用單數(shù)。 a number of表示表示“許多許多

8、”,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),謂語(yǔ)動(dòng)詞修飾可數(shù)名詞復(fù)數(shù)。作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用復(fù)數(shù)。用復(fù)數(shù)。number前可用前可用large,small等修等修飾,表示程度。例如:飾,表示程度。例如: The number of students in our class is fifty. The number of pages in this book is forty. A number of students are playing on the playground. 主謂一致專項(xiàng)練習(xí)題1 The number of the students in our school _

9、1200. 1 The number of the students in our school _1200. A. is B. are C. has D. have A. is B. are C. has D. have 2 The number of the students in our school _1200. 2 The number of the students in our school _1200. A. is B. are C. has D. have A. is B. are C. has D. have 3 Two days _enough for me to fin

10、ish the work.I need a third 3 Two days _enough for me to finish the work.I need a third day.day. A. isn A. isnt B. is C. arent D. are 4 4. _ the teachers in their school is about 200 and one fourth of them are _teachers. A number of; women B. A number of; woman C. The number of; women D. The number

11、of; woman5 5. -What _ the number of the students in your school? -About two thousand. A number of them _ from England. A. is; are B. is; is C. are; is D. are; are2. 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)中。在近幾年,老虎處于瀕臨滅絕的危險(xiǎn)中。in danger (of)意為意為“處于(處于()危險(xiǎn)之中)危險(xiǎn)之中”。例

12、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!3. As forests disappear, tigers lose their homes.隨著森林的消失,老虎失去了它們的家園。隨著森林的消失,老虎失去了它們的家園。as在句中作連詞,引導(dǎo)狀語(yǔ)從句,意為在句中作連詞,引導(dǎo)狀語(yǔ)從句,意為“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 sh

13、e 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(duì)對(duì)是重要的是重要的)3. The river is polluted and _ going dry.(處于處于危險(xiǎn)中危險(xiǎn)中)The number ofimportant toin danger of4. _ time went by, she became more and more beautiful. (隨著隨著) 5. _ the party, he gave me a gift. (在在之初之初)6. The temperature has _ below zero. (下降到下降到)7. It is at the bottom of the _. (食物鏈?zhǔn)澄镦?8. You know, computers bring troubles _. (也也)AsAt the beginning ofdropped tofood chainas well在在之初之初下降到;跌至下降到;

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