PAST TENSES I
Past Simple
This is the basic past tense. We use it whenever we want to talk about the past and we don't have any special situation that means we should use the past perfect, present perfect or past continuous.
Finished actions, states or habits in the past.
1: We use it with finished actions, states or habits in the past when we have a finished time word (yesterday, last week, at 2 o'clock, in 2003).
2: We use it with finished actions, states or habits in the past when we know from general knowledge that the time period has finished. This includes when the person we are talking about is dead.
3: We use it with finished actions, states or habits in the past that we have introduced with the present perfect or another tense. This is sometimes called 'details of news'.
4: For stories or lists of events, we often use the past simple for the actions in the story and the past continuous for the background.
Unreal or imaginary things in the present or future.
5: We use the past simple to talk about things that are not real in the present or future. So we use it with the second conditional and after words like 'wish'.
Past Continuous
1: An action in the past which overlaps another action or a time. The action in the past continuous starts before and often continues after the other shorter action or time.
2: In the same way, we can use the past continuous for the background of a story. (We often use the past simple for the actions.) This is really a specific example of Use 1.
3: Temporary habits or habits that happen more often than we expect in the past. We often use 'always', 'constantly' or 'forever' here. This is the same as the way we use the present continuous for habits, but the habit started and finished in the past. This thing doesn't happen now.
4: To emphasise that something lasted for a while. This use is often optional and we usually use it with time expressions like 'all day' or 'all evening' or 'for hours'.