Module 12 Help Unit 3 Language in use课件(共30张PPT)

(共30张PPT)
Module 12 Help
Unit 3 Language in use
目录
课堂小测
02
课后作业
03
语法聚焦
01
语法聚焦
祈使句和情态动词must,can,could表示推测
一、祈使句
1.祈使句简介
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 when driving.小心驾驶。
No swimming! 禁止游泳！
2.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。
3.祈使句的回答
祈使句的动作通常是表示将来发生的动作，所以回答祈使句时，一般用will或 won’t。在回答具有否定意义的祈使句时，表达“会去做这件事”时，用“Yes，I / we will.”来回答，如果表达“不会去做这件事”，则用“No, I / We won’t.”回答。但是在翻译成中文时，yes是“不”的意思，no是“是”的意思。如：
—Don’t go out, please.It’s raining heavily outside.请不要出去。外面在下大雨。
—Yes, I will.I have to meet my brother at the airport.不行，我要出去。我得去机场接我的弟弟。
二、情态动词must, can, could, may, might表示推测的用法
1.must的用法
（1）must表示推测时，意为“一定,准是”，语气强烈，表示非常肯定，通常只用于肯定句中。 如：
He must be American.=It is certain that he is American.他准是美国人。
（2）must可以表示对现在的状态、正在发生的事情或已经发生的事情的推测。如：
He must have a car now.他现在一定有辆小汽车。（现在的状态）
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.他一定已经完成了工作。（已经发生）
【注意】must不常用于表示对未来的推测。
2.can / could的用法
(1)can表示推测时，可用来表示对过去、现在、未来的推测，往往用于否定句和疑问句。用于否定句时，cannot(can’t)意为“一定不，肯定不”，表示不可能，意义与must相反。如：
He can’t be at home.=It is impossible that he is at home.他一定不在家。
(2)could表示推测时，也可用来表示对过去、现在、未来的推测，可用于肯定句、否定句和疑问句。用于肯定句时，could意为“可能”；用于否定句时，表示“不可能”。如：
The plane could be delayed by fog.飞机可能会因为雾晚点。
It couldn’t be poison.这不可能是毒药。
(3)当询问可能性时，可以使用can或could来询问，但是can表示的“可能性”比could要大。如：
Can / Could he know my address 他有可能知道我的地址吗？
3.may / might的用法
may与might也可以用来表示对过去、现在、未来的推测，通常用于肯定句和否定句。用于肯定句时，may / might意为“可能”；用于否定句时，may / might意为“可能不，也许不”。
may与might所表示的“可能性”比could小。如：
He may / might get there in time, but I can’t be sure.他有可能准时到达，但我不敢肯定。
The boy may / might not be watching TV at home.这个男孩可能没在家看电视。
一、单项填空
( )1.—_________ on the TV, Jim.I’d like to watch the evening news.
—OK, Dad.
A.Turn B.Turned C.Turning D.To turn
专练
A
( )2.Mr Zhou can’t find his ID card anywhere.It_________ be lost.
A.can’t B.should C.must D.mustn’t
( )3.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
C
C
( )4.—What will the weather be like next week？
—It_________ be rainy，cloudy or sunny.Who knows？
A.can’t B.might C.must D.shall
( )5.Tom, _________ afraid of speaking out your ideas.
A.don’t B.not C.not be D.don’t be
B
D
二、根据要求完成句子，每空一词
6.He must be at home now.(改为否定句)
He____________ ____________ at home now.
7.You must be careful with your handwriting.(改为祈使句)
____________ ____________ ____________ your handwriting.
can’t
be
Be
careful
with
8.Talk and read loudly in class.(改为否定句)
____________ ____________ ____________ ____________ loudly in class.
9.Don’t tell him the news.(改为肯定句)
____________ ____________ the news.
10.Let Tom have a look at the book.(改为否定句)
____________ Tom ____________ ____________ a look at the book.
Don’t
talk
or
read
Tell
him
Let
not
have
课堂小测
一、根据句意及首字母或汉语提示填单词（注意使用正确形式）
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.
3.Don’t eat too much sugar.It’s h____________ to your teeth.
magine
rouble
armful
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 fires.It’s dangerous.
earthquake
clear
二、单项填空
（ ）6.It _____ be the postman at the door.It is only 6:00 am now.
A.can’t B.mustn’t C.won’t D.needn’t
（ ）7.—I have great _____ in learning Chemistry and I am so worried.Could you help me
—Sure.I would be glad to.
A.interest B.trouble C.fun D.joy
A
B
（ ）8.There is _____ with the computer.It doesn’t work.
A.something wrong B.wrong something
C.nothing wrong D.wrong nothing
（ ）9.It’s time for class.Don’t _____ in the classroom.
A.noisy B.be noisy C.is noisy D.be noise
A
B
（ ）10.—Don’t forget to wear school uniforms on Monday morning.—_____.
A.OK, I will B.No, I will
C.No, I won’t D.Yes, I won’t
C
三、语法选择
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 _11_ 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 _12_,but he still _13_ 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 _14_ to watch his son’s fruitless efforts.The father didn’t help him _15_ asked instead,“Son,have you tried your best I mean, are you doing _16_ you can ”
“Yes,I am!” the boy cried.
“No,” his father said _17_, “you’re not.You have not asked me _18_ you.”
Asking for help is not a weakness.Many people need help, and even _19_ best of us need help.It’s important to know _20_ to ask for help and understand why you need it.Never be afraid to ask others for help when you’re in trouble.
（ ）11.A.he B.his C.him
（ ）12.A.hard B.harder C.hardest
（ ）13.A.mustn’t B.shouldn’t C.couldn’t
（ ）14.A.stopped B.stops C.will stop
（ ）15.A.but B.or C.and
B
B
C
A
A
（ ）16.A.something B.nothing C.everything
（ ）17.A.calm B.calmly C.calmness
（ ）18.A.help B.helping C.to help
（ ）19.A./ B.the C.a
（ ）20.A.why B.when C.where
C
B
C
B
B
课后作业
此部分习题详见独立装订的《分层作业本》。请同学们完成Module 12 Unit 3的练习题。
THANKS!