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(共16张PPT)
Unit 2
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Section A Grammar Focus
Learning Objectives
能够准确区分 can 和 could 在表达请求和请求许可时的用法及语气差异，并能在具体语境中恰当选用。
能够熟练运用 “Can/Could you (please) + 动词原形”“Can/Could I + 动词原形” 等句型提出请求或请求许可，以及给出肯定或否定回应。
能够结合生活场景，运用所学的 can/could 相关句型进行简单的对话交流，做到表达礼貌、符合语境。
Grammar Focus
Could you please sweep the floor Yes, Dad. I’ll do it at once.
Could I hang out with my friends after lunch Sorry, Jim, but you have to pack up your things first.
Can I put some flowers on the table Yes, good idea!
Can you help me hang up the photos Sure. / No problem!
情态动词could/can
1. 含义：“能够， 可能”
2. 是can的过去式，比can更委婉
3. 不能作谓语, 没有人称和数的变化，后加动词原形
3a
Could you please sweep the floor Yes, Dad. I’ll do it at once.
Could I hang out with my friends after lunch Sorry, Jim, but you have to pack up your things first.
Can I put some flowers on the table Yes, good idea!
Can you help me hang up the photos Sure. / No problem!
情态动词could/can
Which sentences are asking for requests
Which sentences are asking for permission
Grammar Focus
3a
Grammar Focus
3a
表示“请求”委婉的请求别人做事
常用句型：Can/Could you (please) +动词原形+其他？
表示“请求许可”委婉的请求别人允许自己做某事
常用句型：Can/Could I + 动词原形+其他？
否定句型：Can/Could you (please) not do sth.？
1. 用于请求别人做某事（提出请求）
常用句型 Can/ Could you ( please ) do sth.
肯定答语 OK./Certainly./Of course./With pleasure./
No problem./Yes, sure.等
否定答语 Sorry, I can’t. I have to…/I’m afraid not./ I’m afraid I can’t. I am going to…等
Grammar Focus
3a
2. 用于请求别人允许自己做某事（请求允许）
常用句型 Can/ Could I do sth.
肯定答语 Yes, you can./Certainly./Yes, please.等
否定答语 Sorry, you can’t./I’m afraid you can’t.等
Grammar Focus
3a
Choose the best question to complete each conversation.
Could you give me a ride to town now B. Can I stay out until eleven
C. Mr. Lake, could I go to the toilet D. Could I use your computer
A
D
B
C
3b
1. You’re at your friend’s home. You want to call your parents, but your phone is dead.
_______________________________________________________________________
2. You were sick at home yesterday. Your friend went to an English class and took notes. You want to know more about the class.
_______________________________________________________________________
3. You are holding a large box. It is difficult to open the door. Your neighbour comes.
_______________________________________________________________________
4. You and your classmates want to help clean up the community. Ask your classmates to bring gloves and rubbish bags.
_______________________________________________________________________
_______________________________________________________________________
Make up conversations for each setting, using can or could.
A: Can / Could I use your phone B: Sure. / Of course.
A: Can / Could I borrow your notes B: Of course. Here are my notes.
A: Can / Could you help me open the door B: Sure. / Of course.
A: Can / Could you bring gloves and rubbish bags for cleaning up the community
B: Sure. / Of course.
/ded/ adj. 不运行的；死的
note /n t/ n. 笔记；记录；便条
v. 注意；指出
take notes 做笔记
清扫
/k mju n ti/ n. 社区；社团
rubbish / r b / n. 垃圾
3c
Summary
What’s the differences between Can and Could
Can/Could for polite request and permission.
Can you/I...
语气：直接、日常，适合熟人或同辈之间。
Could you/I...
语气：更礼貌、委婉，适合对长辈、老师或不太熟悉的人。
Sure./Of course./Not possible./I am afraid not.
1. Yes, Dad. I’ll do it at once.
at once 立刻，马上
你离开教室时，请立刻关灯。
Please turn off the lights at once when you leave the classroom.
at once 同时，同时进行
电脑可以同时做多项工作。
A computer can perform many tasks at once.
Language Points
2. Could you give me a ride to town now
give sb a ride (to sp.) 给某人搭便车，送某人去某地
今天早上我起晚了，爸爸开车送我去学校。
My dad gave me a ride to school this morning because I got up late.
你能载我去图书馆吗？走路太远了。
Could you give me a ride to the library It’s too far to walk.
Language Points
Language Points
3. Yes, if you are careful with it.
be careful with 注意；当心 — be careful of/about.
Please be careful with my car.
You should be careful of your spelling.
— 拓展 ① be careful （not） to do sth 当心/注意（不要）做某事
Be careful not to wake the baby.
② be careful that +从句当心…
You must be careful that you don't catch a cold.
Exercise
1. 你能帮我把这些照片挂起来吗？
you help me these photos
2. 我可以借你的自行车用一下吗？
I your bike
3. 请你帮我打扫一下客厅，好吗？
you please the living room
4. 妈妈，我放学后能和同学一起去公园吗？
Mum, I go to the park with my classmates
5. 你能告诉我怎么到达那家花店吗？
you tell me that flower shop
Could
hang up
Could
borrow
Could
help me clean
could
after school
Could
how to get to
Exercise
“Pass me the book!” → ________________________________
“I want to watch TV.” → ________________________________
“Clean your room now!” → ______________________________
“Let me use your phone.” → _____________________________
“Help your sister with homework!” →
______________________________________
Could you pass me the book
Can I watch TV
Could you clean your room
Can I use your phone
Could you help your sister with homework
Homework
基础性作业
回忆课堂学过的 can/could 请求句型，写出 5 个向家人提请求的句子（比如请家人帮忙递东西、允许自己看电视等）。
拓展性作业
晚上和家人互动时，试着用 3 句课堂学的 can/could 请求句（比如 “妈妈，我能先玩 10 分钟再写作业吗？”），记录家人的回应。
想想平时向老师、朋友提请求时，哪些情况用 can 更合适，哪些用 could 更礼貌，各举 1 个例子。

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