1. he was having a bath when the phone rang.
was he having a bath when the phone rang?
he wasn't having a bath when the phone rang.
2.she left the house at about 7 pm yesterday.
did she leave the house at about 7 pm yesterday?
she didn't leave the house at about 7 pm yesterday.
3. i was cooking while tom was reading.
was i cooking while tom was reading?
i wasn't cooking while tom was reading.
4.she was sleeping at 6 pm yesterday afternoon.
was she sleeping at 6 pm yesterday afternoon?
she wasn't sleeping at 6 pm yesterday afternoon.
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