英语中，你是谁的不同说法

在打电话是，问对方是谁该怎么说呢 Who is that ?

有人敲门时，问门外人时是谁怎么说呢Who is it ?

问你与他人关系 Who are you ?

有人敲门时，问门外人时是谁怎么说呢
Who is it?

在打电话是，问对方是谁该怎么说呢
May I know who's calling please?

如果是对方找人，可以问
May I tell him who's calling?

Who are you?
What's your name?
What do you do(职业）?一般口语中
电话：
Who's that ?
Who's there?
敲门时都简洁点：
Who?
Who is knocking ?

who is it please?
may I know who is speaking?
who are you?

在打电话是 Who's speaking?
有人敲门时 Who are you? / Who is it?