May/Can/Am/Shall I come in?

May/Can/Am/Shall I come in? May i come in中的May可以换成Can吗? May I come in? may i come in对吗.为什么又有shall he come in .两者之间有很不同? -May I ( )(come)in?-Come,please. Am I come in?改错 I am sorry,( ) I can not come May I come in?No,you _. A、mayn't B、can't May I come in?的肯定回答Yes,you can.和Yes,you may.的区别是什么? May I come in?怎样变成祈使句 May I come in?的肯定答语 may i come in,miss gao?中文