Unit 3 Could you please clean your room? 语法专题课件

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八下英语
Unit3 Could you please clean your room
语法专题——情态动词could
情态动词could的用法
课本原句：
Could you please clean your room
你能打扫你的房间吗？
Could you please sweep the floor
你能拖地吗？
Could I watch one show first
我能先看一个节目吗？
情态动词could的用法
1. 表示能力
can的过去式：could
I could play the piano when I was six years old.
Could you play the piano when you were six years old
肯定回答：
Yes, I could.
否定回答：
No, I couldn’t.
What could you do when you were six years old
你六岁时就会弹钢琴了吗？
我六岁时就会弹钢琴了。
你六岁时会做什么？
情态动词could的用法
2. 表示对过去、现在或将来的某种猜测
他可能已经回家了。
He could have gone home.
他可能去了哪里？
Where could he have gone
情态动词could的用法
3. 表示委婉的建议
你不妨向你的老师寻求帮助。
You could ask your teacher for help.
你不妨试一试。
You could have a try.
情态动词could的用法
4. 用于委婉地请求别人做某事
你能带狗出去散步吗？
Could you take the dog for a walk
你能递盐给我吗？
Could you please pass me the salt
注意：could 表示请求时，回答一般不用could
肯定回答：
Sure.
Of course.
Certainly.
No, problem.
否定回答：
Sorry, I’m afraid not. I have to…
情态动词could的用法
5. 征求别人的许可
我能先看一下节目吗？
Could I watch a show first
我能借那本书吗？
Could I borrow the book
肯定回答：
Sure, you can.
Of course.
肯定回答：
Sorry, you can’t.
注意：could 表示征求意见时，回答一般不用could
小结
情态动词could的用法
1. 表示能力:can的过去式
2. 表示猜测：可能
3. 表示委婉的建议
4. 表示委婉地请求别人做某事
5. 表示征求某人的许可
回答一般不用could
巩固练习
根据中文提示完成句子：
你能打扫一下客厅吗？
_____ you please _____ the living room
2. 你可以把那本书递给我吗？
______ ______ ______ that book to me
3. 请你们不要再图书馆大声交谈好吗？
______ you please ______ ______ loudly in the library
4. 你能帮我倒垃圾吗？
当然可以。
_______ you help me _____ _____ the rubbish
_______.
Could
clean
Could
pass
me
Could
not
talk
Could
take
out
Sure
根据中文提示完成句子：
5. 你能帮我做家务吗？
没问题。
_______ you help me ______ housework
______ ____________.
6. 我能借你的相机吗？
当然可以，但请在星期六前把它还给我。
_____ I __________ your camera
_______ _______, but please ______ it __________ by Saturday.
Could
with
No
problem
Could
borrow
No problem
give
back
根据中文提示完成句子：
7. 去年我还不会开车。 我常常做公交车。
Last year I ________ drive. I ______ ______ take the bus.
8. 你脱下衣服后能把他们叠好吗？
______ you ______ your clothes after you _____ them ______
9. 妈妈，我能和朋友出去买写玩具吗？
可以。但是10点之前你一定要回来。
Mum, _____ I buy some toys ______ my friends
Yes,_____ _____. But you ______ come back home before ten o’clock.
couldn’t
used to
Could
fold
take
off
could
with
you can
must
根据中文提示完成句子：
10. 这个周末你能帮我学英语吗？
抱歉，我有重要的事情要做。
________ you please _____ me ______ my English this weekend
______ , I ______. I have _________ __________ to do.
11.我可以邀请朋友来参加聚会吗
Could I ________ my friends ________ the party
12. 你能整理床铺吗？
当然可以。
______you please _____ the ______
_______ _________.
Could
help
with
Sorry
can’t
something important
invite
to
Could
make
bed
Of course
选择题：
1. — Look at the young lady in red. Is it Mrs. King
— No, it ________ be her. She is wearing a white dress today.
A. can B. may C. must D. can’t
2. — Could you please come to the museum with me this afternoon
— Sorry, I ________. I have to take a piano lesson at 2 pm.
A. could B. mustn't C. can’t D. needn’t
3. — ________ I take some photos in the hall
— No, you ________.
A. Can; needn't B. Must, mustn’t
C. Could; won't D. May, mustn't
D
C
D
选择题：
4. You ________ drive your car so fast. It's very dangerous.
A. wouldn't B. shouldn’t C. couldn't D. mightn’t
5. -Must I go to medical school and be a doctor like you, Dad
-No, you ________, son. You're free to make your own decision.
A. can't B. mustn't
C. shouldn't D. needn’t
6. You ________ finish your schoolwork first if you want to hang out with your friends.
A. can B. can't C. must D. needn't
B
D
C
选择题：
7. -Could you go shopping tomorrow
-________. I have to stay at home to do my homework.
A. I think so B. Yes, I hope so
C. I'm afraid so D. Sorry, I'm afraid not
8. -Can you help us clean the living room
--________, but I'm busy cooking.
A. I'd love to B. I hope not
C. I do care D. I'm afraid not
D
A
选择题：
9. —Jet, could you come to the living room, please Come
to help me!
—________________.
A. OK. I’m coming B. Have fun
C. It doesn’t matter D. Sorry to hear that
10. —Could I use your computer, Dad
—Sorry, you ____________. I’m going to work on it.
A. wouldn’t B. can’t
C. needn’t D. don’t have to
A
B
Thank you！