He (eat) dinner when his mum (call) him
He was eating dinner when his mum called him
He (break) his leg while he (ski)
He broke his leg while he was skiing
They (meet) Henry while they (go) home
They met Henry while they were going home
He (fall) asleep while he (read) a book
He fell asleep while he was reading a book
A man (steal) a wallet while the woman (walk)
A man stole a wallet while the woman was walking
He (cook) when the fire suddenly (start)
He was cooking when the fire suddenly started
They (have) a picnic when it (start) to rain
They were having a picnic when it started to rain
He (run) when he (slip) on a banana
He was running when he slipped on a banana
He (swim) when he (see) a shark
He was swimming when he saw a shark