Mettre les verbes entre parentheses au preterit simple ou au preterit en be + V-ing.
When I saw him, he was wearing a tracksuit.
I dropped a plate while I was doing the washing up.
When you arrived, I was reading.
He found a watch while he was walking in the park.
She broke her arm while she was skiing.
She screamed in her sleep because she was having a nightmare.
The driver didn't see the little boy who was playing in the street.
We took our calculators out while the teacher wasn't looking.
Voilà ! J'espère t'avoir aidé(e) ! :)