外研版 (新标准)八年级上册Unit 3 Language in use .教学ppt课件

设计说明

本单元是复习单元，集中总结和练习冠词的基本用法和大数字的读法，复习巩固本模块的重点单词、短语和句型。本课从指导学生朗读Language practice中的句子入手，引入语法的集中讲解与练习。在完成语法专项训练后，安排的是词汇和听力的训练。另外，在本课的末尾还安排了图表制作的实践性环节。所有这些环节的设置，旨在提升学生的语言运用能力。

教学目标

通过本单元的教学，让学生达成以下目标：

1. 知识目标

(1)复习巩固本模块所学生词、短语和句型；

(2)练习巩固冠词的基本用法和大数字的读法。

2. 能力目标

(1)掌握冠词的基本用法和大数字的读法；

(2)制作一个英语图表。

3. 情感目标

提升学生关心社会问题的意识，提升社会责任感。

重点难点

重点：本模块的重点词汇、句型；冠词的基本用法和大数字的读法。

难点：冠词在具体语境中的运用。

教学准备

PPT课件；活动2、9、10的录音

授课时数

1课时

教学过程

Step 1　Language practice

Present the key sentences to the class. Read them aloud with the whole class.

Step 2　Grammar summary

Sum up the grammar together with the whole class.

冠词

冠词是限定词的一种，不能单独使用，须用于名词之前。冠词分两类，一类是不定冠词a和an，另一类是定冠词the。有时也把名词前不用冠词的情况称为零冠词。

I have got a sister. (不定冠词a) 我有一个姐姐。

She has an egg and some bread for breakfast. (不定冠词an)

早饭她吃一个鸡蛋和一些面包。

Lily plays the piano very well. (定冠词the) 莉莉弹钢琴很好。

一、不定冠词的基本用法

不定冠词修饰可数名词单数，指人或物中的某一个或某一类。

1. 首次提到某人或某物，起介绍作用。

I am writing a report on city pollution. 我在写一篇关于城市污染的报告。

2. 表示“每一”的概念，相当于every。

I play computer games once a month. 我一个月玩一次电脑游戏。

3. 用于某些固定短语。　

have a good time玩得开心

in a hurry 匆忙

a lot of 许多；大量

二、定冠词的基本用法

1. 指前面提到过的人或物，或特指某人或某物。

I have a pet dog. The dog is black.

我有一条宠物狗，这条狗是黑色的。

2. 指谈话双方都知道的人或物。

Look at the white dress. How beautiful! 看那件白色的裙子，多漂亮啊!

3. 用于序数词以及形容词的最高级之前。

China has the largest population in the world, and India has the second largest population. 中国是世界上人口最多的国家，印度是第二人口大国。

4. 用于世界上独一无二的事物前。

The sun is bigger than the earth. 太阳比月球大。

5. 在江河、海洋、山脉等地理名词前及由普通名词构成的专有名词前。

the Great Wall of China中国长城

the Pacific Ocean 太平洋

6. 用于表示方位的名词前。

Guangdong is in the south of China. 广东在中国的南部。

7. 用于乐器类名词的前面。

The boy enjoys playing the violin. 这个男孩喜欢演奏小提琴。

8. 在某些形容词前加定冠词，表示一类人或物。

the rich 富人　　　the poor 穷人

the young 年轻人　the old 老年人

9. 在姓氏复数形式之前, 表示“一家人”或“夫妇两人”。

The Browns have been to China. 布朗夫妇两人去过中国。

10. 用于某些固定短语中。

by the way　顺便问一下　　　in the morning 在上午

三、零冠词的基本用法

1. 在球类活动、学科名称前，以及节日、月份、星期前不用冠词。

We have Chinese, English and history on Monday.

我们在星期一上午上语文、英语和历史。

2. 名词前有指示代词、物主代词、数词等时，名词前不用冠词。

We have several questions to ask. 我们有几个问题要问。

3. 在某些固定词组和习惯用语中不用冠词。

by bus乘公共汽车

at night在晚上

in danger 处于险境

[注意]

有些名词前加冠词或不加冠词，所表示的意义不同。

(1) at table 在吃饭

at the table 在桌子旁

(2) in class 在上课

in the class 在班里

(3) in front of 在……的前面 (外部) 

in the front of 在……的前部(内部)

数字

一、大数字

从右到左，将数字每三位数看作一个单位，用逗号隔开。读数字时从左向右，按划分的单位依次读出。

1,235, 408, 967

billion　　million　  thousand

十亿      百万       千

one billion , two hundred and thirty-five million, four hundred and eight thousand, nine hundred and sixty-seven

二、分数

分子用基数词表示，分母用序数词表示。当分母大于一时，分母用复数形式。

one tenth 十分之一

two fifths 五分之二

three eighths 八分之三

[注意]

表达分数时下面是几个特例：

a half 一半；二分之一

a quarter 四分之一

three quarters 四分之三

[拓展] 20%  20 percent

三、小数

小数中的点读作point。

13. 7　　thirteen point seven

140. 78   one hundred and forty point seven eight

1. 8 billion   one point eight billion

Step 3　Practice

1. Work in pairs. Match the countries with their populations. (Activity 1 on page 76)

(1) Write the names of the four countries on the blackboard and ask the students to read them.

(2) Ask the students what they think the population of each country is.

(3) Tell them to match the countries and the populations.

(4) Check the answers in pairs and correct the mistakes.

Answers:

1-d); 2-c); 3-b); 4-a)

2. Read your answers to Activity 1 to the whole class. (Activity 2 on page 76)

(1) Ask the students to say a sentence about each country.

(2) Encourage some students to say sentences in class. Correct their errors with the class.

(3) Ask the students to work in pairs and talk about the populations of the four countries by asking and answering questions in full sentences. For example:

S1: What’s the population of China?

S2: The population of China is 1,370, 537, 000.

(4) Play the recording and ask the students to listen carefully for the large numbers. Tell them to pay attention to the pauses.

3. Read the chart and answer the questions. (Activity 3 on page 76)

(1) Ask the students to read the chart and make sure what it means.

(2) Tell the students to read the questions and then look at the chart and answer them on their own.

(3) Check the answers by asking and answering the questions in pairs.

Answers：

1 Tokyo.   2 Mumbai’s population will increase the most from 2000 to 2025.

3 Mexico City.

4 I think Mumbai will have the biggest population problem because its population will increase fastest.

4. Complete the passage with a, an or the where necessary. (Activity 4 on page 77)

(1) Ask the students to read the passage on their own.

(2) Ask them to complete the passage on their own and then work in pairs to check the answers.

(3) Ask the students to read the passage line by line.

Answers:

(1) an  (2) a  (3) a  (4) the  (5) the  (6) a  (7) a  (8) a  (9) a  (10) /

Step 4　Vocabulary

1. Complete the sentences with the correct form of the words in the box. (Activity 5 on page 77)

(1) Ask the students to read through the words in the box and make sure they know the meaning of them.

(2) Ask the students to read the sentences and think about what’s missing.

(3) Tell them to complete the sentences on their own and then check the answers in pairs.

Answers:

1 better  2 smaller  3 more  4 fewer

2. Complete the diagram showing population problems. Use the words in the box to help you. (Activity 6 on page 77)

(1) Revise the passage in Activity 2 in Unit 2 with the students. Ask them to think about the problems of Arnwick.

(2) Ask the students to work in groups and discuss the missing information.

(3) Ask the students to complete the diagram on their own.

(4) Check the answers in groups.

Answers: the countryside / Parkville; the city; increases; air pollution; water pollution; too much traffic; rubbish (crowded flats); not enough hospitals; need more schools and buses; need better public services; need more police to protect people

3. Complete the passage with the words in the box. (Activity 7 on page 78)

(1) Tell the students to read through the words in the box.

(2) Ask the students to read the passage and complete it with the words on their own.

(3) Check the answers in pairs.

Answers:

(1) population  (2) countryside  (3) space  (4) pollution  (5) traffic

4. Complete the sentences with the expressions in the box. (Activity 8 on page 78)

(1) Ask the students to read through the expressions in the box and check the meaning with the students.

(2) Ask the students to read the sentences and complete them with the expressions. Then check the answers in pairs.

Answers:

1 all over the world  2 in the future  3 closed down  4 it takes 

5 not…any more

Step 5　Listening

1. Listen and choose the best summary. (Activity 9 on page 78)

(1) Ask the students to read the choices.

(2) Play the recording. Tell the students to listen carefully to decide the answer.

(3) Check the answer with the whole class.

Answer: d)

2. Listen again and choose the correct answer. (Activity 10 on page 78)

(1)Ask the students to read the sentences and think about the correct answer.

(2) Play the recording. And tell the students to circle the correct answer.

Answers:

1 cheaper  2 pay for  3 sometimes  4 are

(4) Play the recording again. Show the tapescript if necessary.

3. Work in pairs and discuss this question. (Activity 11 on page 79)

(1) Ask the students to discuss this question in groups.

(2) Encourage some groups to share their ideas with the whole class.

Step 6　Around the world

T: Boys and girls, what can we do with water in our daily life?

S1: …

S2: …

…

T: We can’t live without water. Is there enough water in the world for people to use? The answer is NO. Let’s read a passage for some information.

Ss:…

…

Step 7　Module task

1. Work in groups. Prepare to make your graph. (Activity 12 on page 79)

Tell the students to work in groups. First, choose a country or town. Then decide the points of time you want to look at. Finally, research the population of place in different years.

2. Make your graph. (Activity 13 on page 79)

3. Write a paragraph to describe your graph. (Activity 14 on page 79)

4. Present your graph to the class. (Activity 15 on page 79)

One possible answer:

In the graph, we can see how the population in the town changed between 1900 and 2000. We can see the population going up the vertical line and the years going across the horizontal line. The graph shows the population increased by more than one hundred percent from two and a half million to five million in one hundred years. At first it increased very slowly, but after 1945 it increased much more quickly. From 1990 to 2000, the population even increased by one million. The town itself also grew in size during this time.

Step 8　Homework

1. Go over what you’ve learnt in Unit 3.

2. Preview the new words and expressions in Module 10.

当堂达标

I. 单项填空

1. —I think it’s necessary to learn how to work in groups.

  —I quite agree. Sometimes it’s even ________ than grades.

A. less important B. more important

C. the least important D. the most important

2. The weather is becoming ________.

A. hotter and hotter B. more hot and hot

C. hoter and hoter D. more and more hot

3. Mike is from ________ English-speaking country.

A. / B. a C. an D. the

4. Chinese learning is popular with people all over ________ world.

A. a B. / C. an D. the

II. 用a, an或the填空，不需要填的地方画/

1. Our National Day is on ________ first day in ________ October.

2. ________ apple a day keeps the doctor away.

3. — Tom, is ________ bag on the table yours?

  — Yes, it is.

4. ________ Great Wall is one of the seven wonders around the world.

5. It takes about three hours and a half to get Beijing by ________ train.

6. Allen is ________ English teacher and she comes from ________ European country.

7. What are your plans for this ________ weekend?

8. ________ Smiths are going to China next week.

答案：I. 1-4　BACD

II. 1. the, /  2. An  3. the  4. The  5. /  6. an, a  7. /  8. The

板书设计

教学反思

教学反思