外研（新标准）版八年级上 Module 11 Way of life Unit 3 Language in use 课件（23张PPT）

(共23张PPT)
Module 11 Way of life
Unit 3
Language in use
Focus on
基本含义和用法
情态动词
must/must not (mustn't)
can/can not (can't)
need/need not (needn't)
(1) You must use red paper for hongbao
because red means luck.
你必须用红纸做红包，因为红色代表幸运。
否定形式 must not (mustn't) 表示“不能”或“禁止”的意思。
(2) In my home town, people say you mustn't
do any cleaning on the first day of the
Spring Festival.
在我的家乡，据说大年初一不能打扫卫生。
1. must
(3) Must I come before 6:30 tomorrow
明天我必须在六点半之前来吗？
must 表示“必须，一定要”，可用于肯定句、否定句和疑问句。
(3) Must I come before 6:30 tomorrow
明天我必须在六点半之前来吗？
Yes, you must.
是的，你必须在那之前到。(表示一定要)
No, you needn't/you don't have to.
不，你不必在那之前来。(表示没必要)
注意：否定回答不可以用 mustn’t。
肯定回答：
否定回答：
(1) When you get to know each other better or when they ask you to, you can just use their first names.
当你们更加熟悉或他们请你(这样做)时，你就可以只称呼他们的名字了。
(2) You can't put the milk in first.
你不能先倒牛奶。
(3) Can we go home now, please
请问我们现在能回家吗？
2. can
can 表示“许可，可以”，可用于肯定句、否定句和疑问句。
否定形式 cannot (can't)表示“不能，不可以”，语气弱于 must not (mustn't)。
注意：本模块所学的can与以前所学的can意义不同，以前所学的 can 表“能力”，这里表“允许”。
没有禁止的含义
(3) Can we go home now, please
请问我们现在能回家吗？
Yes, you can.
可以。(表示允许)
No, you can't.
不行。(表示不允许)
肯定回答：
否定回答：
(1) If she wants anything, she need only ask.
如果她要什么，说一下就行了。
(2) You needn't wait.
你不必等待。
3. need
need 作情态动词表示“需要”，可用于肯定句、否定句和疑问句。
(3) Need I report it to the police
我要向警方报告这件事吗？
否定形式 need not (needn't) 比较常用，表示“不需要”或“不必要”。
(3) Need I report it to the police
我要向警方报告这件事吗？
肯定回答：
否定回答：
No, you needn't.
不，没必要。 (表示没必要)
Yes, you must.
是的，你必须报告。 (表示必须做)
(1) I need to clean the house.
我需要把房子打扫一下。
(2) You don't need to leave now.
你没必要现在走。
注意，need 也可以作行为动词，表示“需要”，常用于 need to do sth. 结构。
(1) My bike was broken yesterday, so I had to walk to school.
昨天我的自行车坏了，所以我只能走路去学校。
(2) Kate has to travel a lot because of her job.
因为工作，凯特不得不经常出差。
(3) All passengers must wear seat belts.
所有乘客都要系安全带。
have to must
同 异
表示“必须”
侧重说话者的主观看法，认为有必要，有义务去做某事
侧重于客观需要，有“被迫；不得不”之意
4. have to 与 must 的区别
否定形式 含义
have to
must
(1) You don't have to tell him about it.
你不必告诉他这件事。
(他可能知道了或者没有必要让他知道)
(2) You mustn't tell him about it.
你绝对不要告诉他这件事。 (可能是秘密)
must not/mustn't
do not/don't have to (= needn’t)
一定不要, 不允许
不必
You'd better get some sleep.
你最好睡一会儿。
You'd better not waste any more of your time.
你最好别再浪费你的时间了。
5. had better
had better 表示劝告或建议，意思是“最
好……”。
had better 的否定形式为 had better not。
had better 一般不用于疑问句中。
1 A: Can you drive a car at the age of seventeen in
England
B: Yes, we ____. How about in China
A: No, we ______.
2 A: Can you open a gift immediately after you
receive it in England
B: ___________. What about in China
A: No, we usually don’t.
3 A: Can you push your way onto a bus in England
B: ___________. How about in China
A: No, we _____ either.
4 A: Can you drive on the right-hand side of the
road in England
B: ___________. What about in China
A: Yes, we must.
can
can't
Yes, we can
No, we can't
No, we can't
can't
Complete the conversations with can or can’t.
P92
1
School rules
1 You ________ be late for school.
2 You ________ eat in the library.
3 You ________ ride your bike in the playground.
4 You _____ do your homework.
5 You _____ listen to the teacher.
must not
must not
must not
must
must
Complete the sentences with must or must not.
P92
2
It is important to know what you must and must not do when you meet people from a different country.
You (1) may / must not ask Westerners “How old are you ” because it is not polite. You (2) might / can know someone well, but you (3) must / need not ask “How much money do you make ” He (4) may / can never speak to you again!
In public places, you (5) must / can ask people before you take photos of them, and you (6) must not / might not eat or drink in shops or museums.
In some countries you (7) cannot / can go into someone’s house with your shoes on. You (8) need not / must not take them off. But in some other countries you (9) might / must not wear shoes in the house.
Underline the correct words.
P93
3
must mustn’t
1 clean up bedroom once a week
2 wash up after dinner
3 stay out after 9 pm
4 do homework before going out
5 wash hands before dinner
6 play music loudly after 10 pm
√
√
√
√
√
√
Listen to a teenager talking about his life. Check(√) the things he must or mustn’t do.
P93
4
1. _________________________________
_______________________________
2. _________________________________
_______________________________
He can go out with his friends at weekends.
He can play music loudly before ten o’clock at night.
Listen again. What two things does he say he can do
P94
5
-I must visit my grandparents once a week. I mustn’t stay up late in the evening.
- …
Talk
Now work in pairs. Tell each other three things you must do at home and three things you mustn’t do. Are your home rules different or the same
For example:
1. Use your __________ to look up any words you do not understand.
2. Most Chinese people eat noodles with ____________.
3. Jenny could not wait to open her birthday ________.
4. He thinks it is cool to wear his __________ back-to-front.
5. Where is my __________ Let's play a game.
dictionary
chopsticks
presents
baseball cap
chess set
Complete the sentences with the words or expressions in the box.
baseball cap chess set chopsticks dictionary presents
P94
7
baseball cap bike chess set
chocolate chopsticks dictionary
fish and chips litter photo
video game
A: Many people have one.
B: Is it a chess set
A: No. You use it to get
to places.
C: Is it a bike
A: Yes.
For example:
Play a game. Choose a word or an expression from the box and describe it to the class. The class guess what it is.
P94
8
Giving advice to foreign guests who are visiting a Chinese family
Write some advice for foreign visitors to a Chinese family. Think about:
Module task:
Step 1:
What must they wear
What mustn't they talk about
What can't they do
What presents can they bring
When must they arrive
…
Send the advice of the whole class to your foreign friends or post it on your class blog.
Show the advice your group choose in Step 2 to the whole class. Put the pieces of advice together to form the advice of the whole class.
Work in groups. Show the advice you wrote in Step 1 to your group members. Choose two best pieces of advice.
Step 2:
Step 4:
Step 3:
1. Review the grammar we’ve learnt today.
2. Finish the exercises in Learning English.
3. Preview the new words and expressions in Module 12.