李江L17_Save_the_Tigers[1]

1、Lesson 17Lesson 17Save the TigersSave the Tigers 西坡中学：西坡中学： 李李 江江centuryfursymbolcouragebravechainn. 世纪世纪n. （兽类的）毛（兽类的）毛n. 标志，象征标志，象征n. 勇气，胆量勇气，胆量adj. 勇敢的，无畏的勇敢的，无畏的n. 链子；链条链子；链条Words and expressionsU3L17Wor.mp3balancereasondisappearkillcutdecreasen. 平衡，平稳平衡，平稳n. 原因，动机，理由原因，动机，理由v. 消失，失踪消失，失踪v. 杀死杀死

2、v. 砍，切，剪，割砍，切，剪，割v. 使使变小；减少变小；减少Words and expressionsTo use the following words century, courage, brave, reason, kill, cut。 了解一些介绍保护动物的句式。了解一些介绍保护动物的句式。教学目标教学目标1、分析文章，理解中心思想、分析文章，理解中心思想2、掌握一些与保护动物有关的词汇并了解保护动物的方法。、掌握一些与保护动物有关的词汇并了解保护动物的方法。3、掌握以下介绍保护动物的句式：、掌握以下介绍保护动物的句式：（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.重点难点重点难点 1. 在在之初之初 2. 的数量的数量 3.下降到下降到;跌至跌至 4. 食物链食物链 5. in balance 6. in danger 7. as

4、 well 8. cut down L17.mp3听并听并 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. 在二十世纪初期，野生老虎的数量大在二十世纪初期，野生老虎的数量大约是十万只。约是十万只。 the number of意为意为“的数量的数量”，跟复数名词连用作主语时，谓语动词跟复数名词连用作主语时，谓语动词要用单数。要用单数。 a number of表示表示“许多许多

8、”，相当于，相当于many，修饰可数名词复数。作主语时，谓语动词修饰可数名词复数。作主语时，谓语动词用复数。用复数。number前可用前可用large，small等修等修饰，表示程度。例如：饰，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. 主谓一致专项练习题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. 在近几年，老虎处于濒临灭绝的危险中。在近几年，老虎处于濒临灭绝的危险中。in danger (of)意为意为“处于（处于（）危险之中）危险之中”。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.随着森林的消失，老虎失去了它们的家园。随着森林的消失，老虎失去了它们的家园。as在句中作连词，引导状语从句，意为在句中作连词，引导状语从句，意为“随着，当随着，当的时候的时候”。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. (的数量的数量)2. Its _ your health. (对对是重要的是重要的)3. The river is polluted and _ going dry.(处于处于危险中危险中)The number ofimportant toin danger of4. _ time went by, she became more and more beautiful. (随着随着) 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 _. (食物链食物链)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；