Module 12 Unit 3 Language in use课件(共28张PPT)

(共28张PPT)
Unit 3 Language in use
目录
语法聚焦
01
课堂小测
02
课后作业
03
语法聚焦
祈使句和情态动词must, can, could表示推测
一、祈使句
Open your book, please. 请把你们的书本打开。
Let’s have a break. 让我们休息一下。
Let me have a look at your new bike. 让我看看你的新自行车。Be careful to drive the car. 小心驾驶。
No swimming! 禁止游泳！
1. 祈使句的否定形式
（1）一般祈使句的否定形式是在句首加Don’t。如：
Don’t ask me about that. 不要问我那件事。
（2）Let型的祈使句变否定句时，可在句首加don’t，也可在动词原形前加not。如：
Don’t let the children know the reason.=Let the children not know the reason. 不要让孩子们知道原因。
2. 祈使句的反意疑问句
在反意疑问句中，陈述句部分是祈使句，如果祈使句是以let’s开头的，附加疑问句部分用shall we；如果祈使句不是以let’s开头的，则附加疑问句部分用will you。
二、情态动词must, can, could表推测的用法
情态动词中的must, can, could都可以表推测。具体用法如下： 1. must的用法
（1）表示推测“可能性”时，意为“一定；准是”，语气较肯定，较有把握。 如：
He must be American.=It is certain that he is American. 他准是美国人。
（2）must表推测时只能用于肯定句。如果要表示“一定不；肯定不”的意思时，应用can’t，如询问某种可能时，应用can。如：
He must know my address. 他肯定知道我的地址。（一定） He can’t know my address. 他肯定不知道我的地址。（一定不）
Can he know my address 他可能知道我的地址吗？（询问可能性）
（3）must表示推测时，可以推测现在、正在发生的动作或过去发生的动作。如：
He must have a car now. 他现在一定有辆小汽车。（现在） He must be doing his exercises in the classroom. 他一定正在教室里做练习。（正在进行）
He must have finished the work. 他一定已完成了工作。（过去发生）
注意：must表示推测时很少用于将来的情况。
2. can / could的用法
（1）can表示推测“可能性”时，往往用于否定句或疑问句。can’t意为“一定不”，语气很肯定。can在疑问句中意思是“会；可能”。如：
He can’t be at home.=It is impossible that he is at home. 他一定不在家。
（2）could可用于表示某事有可能发生或可能是事实。如： The plane could be delayed by fog. 飞机可能会因为雾晚点。
（3）could还可以用于表示客气、委婉、礼貌的请求语气。如：
Excuse me, could you tell me where the bus station is 打扰了，请问你能告诉我公交站在哪里吗？
（4）couldn’t表示否定推测，表示某事不可能真实，或由于特定事实或环境某事肯定不会发生。如：
It couldn’t be poison. 这不可能是毒药。
课堂小测
rouble
magine
一、根据中文意思或首字母提示，用单词的适当形式填空，每空一词
1. I can’t i________ how to live without air or water.
2. When I have t________ learning English, I ask my teacher for help.
armful
earthquake
clear
3. Don’t eat too much sugar. It’s h________ to your teeth.
4. After the_________________ （地震）, the singers gave away lots of money to the local people.
5. Please keep_________________ （不和……接触的）of fire. It’s dangerous.
Don’t
or
二、按要求完成句子，每空一词
6. Run and shout in the library. （改为否定句）
_________________ run_________________ shout in the library.
7.You mustn’t be late for work.（改为祈使句）
_________________ _________________ ____________ for work.
late
be
Don’t
Tell
him
such
8.Don’t tell him the news.（改为肯定句）
_________________ _________________ the news.
9.Kate is a brave girl. We are all proud of her. （用such … that … 改写）
Kate is _________________ ________ brave girl _________ we _________________ all proud of her.
10.Hide under the table.（改为否定句）
________ _________________ under the table.
a
that
are
Don’t
hide
三、单项填空
（　　　）11. —_________________ on the TV, Jim. I’d like to watch the evening news.
—OK, Dad.
A.Turn B.Turns
C.Turning D.To turn
A
C
（　　　）12. Mr Zhou can’t find his ID card anywhere. It_________________ be lost.
A.can’t B.should
C.must D. mustn’t
C
（　　　）13. The bag _________________ Betty’s. Hers is much bigger than this one.
A. can be B. may be
C. can’t be D. may not be
B
（　　　）14. —What will the weather be like next week？
—It_________________ be rainy，cloudy or sunny. Who knows？
A.can’t B. might
C.must D. should
（　　　）15. Tom, _________________ afraid of speaking out your ideas.
A. don’t B. not
C. not be D. don’t be
D
四、语法选择 （核心素养：思维品质）
A small boy was trying to move a big wooden box out of his yard. The box was much heavier than the boy. He tried 16 best to move it, but the box would not move at all. After resting for a glass of water, the boy tried to move it once more. This time, he pushed 17 ,but he still 18 move the box a bit. He was quite tired and lost heart.
The boy’s father was coming home from work around this time. He stopped 19 his son’s fruitless efforts. The father didn’t help him 20 asked instead, “Son, have you tried your best I mean, are you doing 21 you can ”
“Yes, I am!” the boy cried.
“No,” his father said 22 , “you’re not. You have not asked me 23 you. ”
Asking for help is not a weakness. Many people need help, and even 24 best of us need help. 25 important to know when to ask for help and understand why you need it. Never be afraid to ask others for help when you’re in trouble.
（　　）16. A. he B. his C. him D. himself
（　　）17. A. hard B. harder C. hardest D. hardly
（　　）18. A. mustn’t B. shouldn’t C. needn’t D. couldn’t
（　　）19. A. to watch B. watching C. watch D. watches
（　　）20. A. but B. though C. because D. so
B
B
D
A
A
（　　　）21. A. something B. anything C. everything D. nothing
（　　　）22. A. calm B. calmer C. calmest D. calmly
（　　　）23. A. help B. helped C. to help D. helping
（　　　）24. A. / B. the C. a D. an
（　　　）25. A. It B. It is C. Its D. Itself
C
D
C
B
B