Answers
1. (see – go)
When I saw Samantha, she was going to work.
2. (cook* – prepare*)
While James was cooking, Sarah was preparing the table.
3. (look* – decide*)
First we looked at the hotel room, then we decided to stay.
4. (do – phone*)
What were you doing when I phoned you?
5. (rain* – leave)
It was raining when I left the office.
6. (open* – start*)
As the concert finished/was finishing, it started to rain.
7. (jump* – sleep)
A cat jumped on my lap while I was sleeping.
8. (go – not have)
They were going to help me, but in the end they didn’t have enough time.
9. (lose – do)
Did you lose your wallet when we were doing the shopping?
10. (not know – come)
I didn’t know you were coming to the party!
* = verbos regulares