Alison lived in San Francisco after she finished school.
Alison took the train while she was living in San Francisco.
We saw two cars crash.
As we were walking along the sidewalk, we saw two cars crash.
We would go to the beach after school.
We used to go to the beach after school. (earlier stage of life)
She used to have a surf board. (state of possession)
She would have an amazing tan by the time summer ended. (conditioned outcome)
Where did you get those jeans?
Where have you been? (for the past few hours)
Wow! He did a back flip! (emotional response)
He has done lots of back-flips in his career.
I got in my car, headed for the highway, drove several miles.
I looked behind me a saw a police car. He had been following me for a mile.
Jamie (let) _____the ball drop in yesterday's final play.