Unit 1 The Changing World Topic 3 The world has changed for the better. Section A 课件 21张PPT

Unit 1 The Changing World

Topic 3 The world has changed for the better .
Section A

Learning aims（学习目标）
Learn some new words and phrases（掌握新单词和重要短语）
block， artist， visitor， industry， chemistry， term
As a matter of fact ，millions of
能区别for和since引导的时间状语，并能在现在完成时态中正确使用。
Talk bout the changes in your hometown（谈论家乡变化）
Step1: Review
1. He ____ _____ to Beijing twice.（他去过两次北京）
2. --Where is Jim?
--Oh, he ____ ____ to Beijing. （他到北京去了。）

Brainstorm：
你能说出现在完成时常见的标志词吗？
Review
already yet ever never just
I have called you，but you weren’t in.
I have been there before.
It has reached 1.37 billion.
Have you found him ?
Have you been to the cinema nearby?
Self-check （预习检测）
街区
游客
数以百万的
美术家，艺术家
工业，行业
化学
学期
事实上
What took place in New York?
Read 1a again, and answer the questions
1.How was New York’s traffic?
2.What about its streets in the past?
3.Does it change now?
4.Is New York a dangerous place now?
Key Points
You will get used to it very soon.
They used to be, but the city has improved a lot.
As a matter of fact/ In fact, Lucy is good at dancing.
As a matter of fact/ In fact, I am strong.
as a matter of fact = in fact
You have been in New York for a long time.
for a long time
came to New York
present
past
sb. have/ has been in... 某人一直在……
e.g. I have been in the new school for a week.
for a week
last week
present
past
for + 时间段
..., but the city has improved a lot since I came here a few years ago.
since I came here a few years ago
came here
present
past
since +从句（从句谓语动词用过去式）
e.g. She has worked in the school since 1995.
since 1995
lived
present
past
since +时间点
e.g. He has waited for Tom since two hours ago.
since two hours ago
8:00
present
past
since + 时间段+ago
10:00
3 Look carefully and think about the differences between since and for in 1a. Then complete the sentences with since or for and listen and check.
1.I have lived in Beijing ______ three years.
______2011.
2. He has waited for Tom ______ two hours ago.
______ two hours.
3. We have learned chemistry ___ one month.
____ the new term
began.
for
for
for
since
since
since

n.化学
n.学期
millions of 用法：
在英语中hundred , thousand , million , billion等词，当其前面有数词时，它们不加 “s”使用，其后也不用介词of .直接跟可数名词的复数形式。 如：five million people 五百万人
当表达不确定数字时，在它们后面加上 “s”再加介词of使用。后接可数名词的复数形式，表示 “数百” “数千” “数百万” “数十亿”。如：
millions of people 数百万人
4 Work in groups and talk about the place you live. Compare today’s situation with that of the past. The following dialogs may help you.
A:I have been in … for /since …
B: How do you like living there ?
A: It is … / Very good. /I really…
B: Was the local traffic terrible /good/…?
A: Yes./No, it was … / used to be … in the
past, and now it is …
B: …
like this :
I have been in … for /since …
It is … I really like living there.
It used to be … in the past,
and now it is …
当堂检测： Fill in the blanks with for or since.
1. His father has been dead ______ he was
ten years old.
2. Michael has been away from the army
______ six years.
3. He has been in Chongqing _______2003.
4. My brother has had a car ______ two
months.
5. Tom has kept a book ______ 5:00 a.m.
since
for
since
for
since
Summary:
1. Some words: block, artist, visitor, industry, chemistry, term
2. Some phrases: as a matter of fact , millions of
3. Some sentences:
1. You will get used to it very soon if you come.
2. As a matter of fact , it’s a wonderful place to live .
3. You must come for a visit .
4. Then you can see New York yourself .
Use the Present Perfect Tense with for and since .
1.You have been in New York for a long time.
2.The city has improved a lot since I came here a few
years ago .

Homework
2. Make five sentences , using for and since.
1. Recite 1a.
4. Preview Section B.
3. Finish Section A in your workbook.