A:may i ask you some questions?
我能问你一些问题吗?
B:yes,please
可以,请说
A:can you answer me some questions?
你能回答我一些问题吗?
B:yes,i can
是,我能
第一个主语是“A”
第二个主语是“B”
can 常常表示一种能力
can you.你能...yes,i can /no,i can’t
may i.我可以.yes,you may/can 或者sure,go ahead /no,you can't/mustn't.或者no ,please don't