While

he

was

swimming

a shark

ate him

While

he

was

listening to music

the phone

rang

While

we

were

driving to work

we

saw a fire

While

I

was

eating lunch

I

heard the news

While

you

were

sleeping

I

stole your money

While

they

were

watching TV

a lion

came into the house

While

she

was

walking

a dog

bit her

While

I

was

studying

it

started to rain