Time expressions - Past Simple and Continuous

Use the Past Simple with:

• Ago: I saw that film two weeks ago.
• Last: Last month, I was on holiday.
• When: When did you see him? I saw him when I was in London.
• Then: I finished my work, then I drove home.

Use the Past Continuous with:

• While: I lost my wallet while I was walking home.
• When: I was having a shower when the phone rang.
• During: During the summer, I was working on a farm.