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对吗.为什么又有shall he come in .两者之间有很不同? May I come in? can i come in对吗英语中CAN I COME IN?这种说法对吗?那如果是考试，老师会不会算对？我知道MAY I COME IN -May I ( )(come)in?-Come,please. May i come in的同义句 May I come in?怎样变成祈使句 May I come in?翻译成中文 May I come in?的肯定回答 may i come in有没有错 may i come in 的另一种说法 May i come in怎么读 may i come in,miss gao?中文 may i come in 的肯定回答 May I come in?的肯定答语 May/Can/Am/Shall I come in? Excuse me.May I come in? May i come in?回答为什么不能用No,you won't May i come