can的用法:
①表示有能力做某事,意为“能、会”.如:
The girl can sing in English.
②表示许可,意为“可以”,如:
You can drive my car to the post office.
③表示推测,意为“也许,可能”.如:
He can’t be your brother, you don’t look the same.
may的用法:
①表示请求,语气比can弱.如:
–May I use your eraser?
– Certainly. But you must give it back to me soon.
②表示推测,意为“也许,可能”.如:
She may be at home. Let’s go to see him.