.Laura was making some tea when she dropped the kettle
while Laura was making tea she dropped the kettle
.Mrs Johnson was sitting in the garden when it started raining
when Mrs Johnson was sitting in the garden it started raining
.Peter was driving his car as he got a flat tyre
when Peter was driving his car he got a flat tyre
.she was walking in the park as a dog attacked her
while she was walking in the park a dog attacked her