Matt (not use) the computer when the modem stopped working.
wasn't using
Yesterday at 9 o'clock the lifeguard (watch) everyone on the beach.
was watching
My sister and I ( not fly) a kite in the park.
weren't flying
We (not cook) lunch at that time. We (prepare) for the meeting.
weren't cooking - were preparing
Yesterday at 7 o'clock my brother (do) his homework.
was doing
My friends (relax) on the beach yesterday at 5 o'clock.
were relaxing
When I walked into the room it was chaos! The children (write) all over the walls!
were writing
The girls (surf) and the boy (sleep) on the beach yesterday at 12 o'clock.
were surfing - was sleeping
I (not sit) in the garden.
wasn't sitting