Помогите пожалуйста. Надо поставить в корректную форму Past Continuous.

1. When I called my friends, they (to play) ____ video games.
2. Yesterday at five I (to cook) ___dinner.
3. We (to play) _____ outside when it suddenly began raining..
4. I (to teach)____ my students when the bell rang.
5. We (not / to sleep) all day.
6.While Abe (to work) _____
in his room, his friends (to swim) ____
in the pool.