While dad was cooking dinner my aunt was watching the evening news.
My dog was running in the garden when it saw our neighbor’s cat.
The teacher was explaining the lesson when the bell announced the break time.
As Susan was crossing the street she saw a terrible accident.
My friends were playing football outside when he fell and hurt his knee.
Alex was riding his bike when it started to rain.
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1)past continuous+while+past continuous
ex.: I was watching tv w͟h͟i͟l͟e͟ my mother was cooking in the kitchen.
2)past continuous+when+past simple
ex.:You were watching tv when it started to rain outside.
3)past simple+while+past continuous
ex.:It started to rain while you were watching tv.
