Past
Past simple
Past Perfect
Past continuous
past events in chronological order
past states
single actions completed earlier in the past. or before another action.
when a longer action (was drinking) is interrupted by a shorter action in past simple (heard).
Had + past participe
Persent perfect
Have + past participle
to set the scene in a story.
2 long actions / while
I was working while it was raining.
When
I was driving when another car crashed into a tree.
knowing exactly what happened at a certain time
What were you doing yesterday at 5pm ? I was reading a book.
yesterday, 2 days ago, in 2009, last week
since, for, ever, still, just , already, yet, never
Did ( verbs)