I have dinner.(eat 보다 점잖은 표현)
I eat dinner.

she had dinner.

have ~ 처해있다.
I have you here.
I'm happy, I have you here.


a:Where are you going?
b:I'm going home.
a:I already had dinner.
I need you.
b:Please, help me!
c:Don't worry.
I'm coming.
b:Thank you.
I'm happy, I have you here.