Question

tense correction we (do) our lessons when the lights went out

Answer 1

We did our lessons when the lights went out .

Answer 2

important to look at the time adverbials (linking time words and phrases) as these can help you understand the function (use) the tense has.

Peter had been working for the same company for ten yearsbefore he resigned.

They had been looking for a flat for six months before they found the right one.

We were watching a horror film when the lights went out.
While we were watching a horror film the lights went out.

Until last week I hadn’t been to London since 2009.

I was preparing the drinks while Sally was cooking.

Lesson by Tristan