Tomas, When you have
You could say "Llámame cuando tienes un momento."
Tienes = You (informal) have Digo = I say/tell
Cuando sale el vuelo?
It means "Do you have a cellphone?"
You have a stapalor?
I have is (yo) tengo You have is (tu) tienes
"You have my body."
You would say "Are you afraid, little girl?"
Literally, it means "You have luck," but it is use to say "You are lucky."
As a declarative: You are patient. As an interrogative: Are you patient?
As a declarative: You have MSN. As an interrogative: Do you have MSN?
As a declarative: You have a pencil. As an interrogative: Do you have a pencil?