Nothing much. You tell us.

I am fine and you?

I mean to call somebody it's correct if I say. "Came in teacher please"or what's the correct sentence..

Are you a student?

Hi, How are you?

I am fine too. thank you. if I have mistakes in my writing please correct me.

Thanks. another question please. Is it ok if I say "Can I come in please?" or I have to say "May I come in please"

I am fine and you?

Thanks. But what should be in question......

I am fine and you??