Complete with BE (in the past) + V-
ing.
1.
Romeo
(dance) with Rosaline when he saw Juliet.
2.
Describe a past activity
Use BE in the past + V-
ing to describe an action
that was in progress (not finished) at a specific time in the past.
3.
Tybalt and Mercutio (fight)
when Romeo came to stop them.
4.
(Juliet sleep) when Romeo arrived with the poison?
Use BE in the past + V-ing to describe an action that was in progress (not finished) at a specific time in the past.