Make questions with how long......?
a) I live in Almaty . How long......?
b) I know Duman. How long.....?
c) Omar is learning German. How long.....?
d) Im waiting for my friend. How long.....?

a) How long have you been living in Almaty? b) How long have you known Duman? c) How long has Omar been learning German? d) How long have you been waiting for your friend?

где e)