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Work in groups , think about them.
What are the same about the four sentences?
Can you divide them into two groups ?
What are they used for ?
3.Can we use “could” to answer these questions?
Findings
Could you please take the dog for a walk?
OK, but I want to watch one show first.
Could you please take out the rubbish?
Yes, sure.
Sorry, I can’t. I have/need to…
B:Yes, sure. /All right./No problem./Yes, I can.
Make requests(提出要求)
A:Could you please do sth…?
Which sentence is more polite? 哪句更礼貌？
A. Can you do the dishes?
B. Could you do the dishes?
Findings
Could I go out for dinner with my friends?
Sure, that should be OK.
Could we get something to drink after the movie?
No, you can’t. you have a basketball game tomorrow
Ask for permission(征询许可)
A: Could I/ we do sth. ？
B: Sure,that should be OK./Yes, you can.
No, you can’t.
Choose the right answer.
Could I stay out late?
A. No, you couldn’t.
B. No, you can’t.