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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.
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.
观察句式输入知识回想并记住之前的句式Step 3 Grammar
Could you(please)+ V-原形?表示委婉地提出请求
1. Could you please clean your room?
Yes, sure. / Of course./ Certainly./All right.
2. Could you please do the dishes?
Sorry, I can’t. I have to do my homework.
在表示请求帮助或请求允许的疑问句中,常用could代替can,以表示礼貌,委婉或不确定的语气,而can则不具备这些语气。这种情况下不能把could看作can的过去式。以上两句中用could是为了表示礼貌的请求。表示请求帮助或请求允许时,除了can, could之外,还可以用may,句子的表达方式也各有不同,可以用不同的方式来表示同一个概念。例:
① Could/Can/May I use your car for a day?
② I wonder if I could use your car for a day?
对于①、②句所作允答可以各种各样,如同意可以说Yes或Sure或Certainly,还可说Yes, (do) please. 或Of course. (you may/can). 或Go ahead, please. 或That’s OK/all right; 如果不同意,可以说I’m sorry you can’t. 或I’m really sorry, but I have to use it today. 要避免说No, you can’t. 这样显得很不礼貌。否定回答通常用委婉语气。
③ Do you mind if I use your car for a day?
对于句③所作回答可以说Never mind. /Not at all. 表“不介意”。不能用Yes. /Sure. /Of course. /Certainly.等。无论肯定还是否定应答中,要避免使用could,要用can或may。因为应答须用确定的语气。而could在表请求的问句中是为了表示礼貌或委婉语气,用在应答中则成了不确定语气,与情理不符。所以应答中不说Yes, you could. 或No, you couldn’t. 而要说Yes, you can. 或Sorry. /No, you can’t.
—Could I please use your computer?
—Sorry, I’m going to work on it now.
—Well, could I watch TV?
—Yes, you can.
Could I/you please …?表示一种有礼貌的请求或提议,其后连接原形动词,比Can you /I…?语气更委婉。类似句型有:
Would you like + sth. / to do sth.?