Funcition :


*Completed Action in the Past
Ex :
(+)You called Mr.Hadi
(-)You did'nt call Mr.Hadi
(?)Did you called Mr.Hadi ?
*A Series of Completed Actions
Ex :
I finished work,walked to the beach and found a nice place to swim
*Duration In Past
Ex :
I lived in Tokyo for three years
*Habit In The Past
Ex :
I studied French  when i was a child
*Active/Passive Voice
Ex :
Tom repaired the car (active)
The car was repaired by Tom (Passive)