Each sentence has one verb in the past continuouss and one in the past simple.
when / he / carry / a suitcase / he / drop / it / on his foot.
When he was carrying a suitcase, he dropped it on his foot.
he / break / his leg / when / he / ski.
He broke his leg when he was skiing.
1. he / sit down / on the chair / while / I / paint / it.
2. as / he / run / for a bus / he / collide / with a lamppost.
3. his hair / catch / fire / when / he / cook / chips.
4. when / he / hold / a beautiful vase / he / suddenly / drop / it.
5. he / sit / in the garden / when / a wasp / sting / him / on the one.
1. he / sit down / on the chair / while / I / paint / it.
=> He sat down on the chair while I was painting it.
2. as / he / run / for a bus / he / collide / with a lamppost.
=> As he was running for a bus, he collided with a lamppost.
3. his hair / catch / fire / when / he / cook / chips.
=> His hair caught fire when he was cooking chips.
4. when / he / hold / a beautiful vase / he / suddenly / drop / it.
=> When he was holding a beautiful vase, he suddenly dropped it.
5. he / sit / in the garden / when / a wasp / sting / him / on the one.
=> He was sitting in the garden when a wasp stung him on the one.
When he was holding a beautiful vase, he suddenly dropped it.
He was sitting in the garden when a wasp stung him on the one.
