I ... when the shower head broke. I... (not - use the toilet) (take a shower)
I wasn't using the toilet when the shower broke. I was taking a shower.
What was your family doing last July? (travel)
We were traveling
The teacher.... when all the student raised their hands. The teacher... (not - give homework) (explain the topic)
The teacher wasn't giving homework when all the students raised their hands. The teacher was explaining the topic
... when his cell phone rang (work)
He was working when his cell phone rang
.... when he got hurt. He.... (not - play tennis) (play soccer)
He wasn't playing tennis when he got hurt. He was playing soccer.
People... when they saw a snake. People... (not - sleep) (walk on the street)
People weren't sleeping when they saw snake. People were walking on the street
... when she fell. She... (not - ride a bike) (ski)
She wasn't riding a bike when she fell. She was skiing
.... while she was sleeping. (use the phone)
He was using the phone while she was sleeping
... while she was reading (drink coffee)
She was drinking coffee while she was reading
.... when she fell (not - ride a horse)
She wasn't riding a horse when she fell