TALKING ABOUT THE PAST
PAST CONTINUOUS
Background description
Action in progress at a particular time
Action in progress interrupted by another action
Two parallel actions
PAST PERFECT CONTINUOUS
Describe an action started before a time in the past and continue until that time
Describes a repeated action during a period of time, but completed by a point in the past
Said a recently completed action before another action in the past and who says no sign to confirm what you say
Main topic
WOULD + INF
Repeated action in the past
PAST SIMPLE
Finished actions, past states
Past habits and routines
Past fact or generalizations
PAST PERFECT
Completed Action Before Something in the Past
Duration before something in the past
USED TO +INF
Past habits not repeated anymore
Past sates not existing any longer