WHILE AND WHEN

While and When

We use while to express that two activities were happening at the same time.

She was sending texts while she was studying.

WHILE STRUCTURE

Past continuous + While + past continuous

Luis was working while Carlos was cleaning.

We use when to express that an activity was interrupted by another one.

I was having dinner when the telephone rang.

WHEN STRUCTURE

Past continuous + When + simple past

We were playing when I fell down.