第1个回答 2011-12-10
否定的是Sorry ,......(然后找个理由搪塞)
外国人就是假、还要编个理由的
第2个回答 2011-12-10
could you please...?
回答肯定句: YES,I can
否定句:No.i can't .
could I...?
回答肯定句: YES,you can
否定句:No.you can't .本回答被提问者采纳
第3个回答 2011-12-10
Yes I could
No I couldn't
of course/sure
No,thanks
有不会的可以再问我