when

[aruzbaba]

1) I was watching television a lot, when I was at home last year.
2) I watched television a lot, when I was at home last year.
3) I had watched television a lot, when I was at home last year.
4) I would watch television a lot, when I was at home last year.

I think 2, 3, 4 sentences are correct.
But what do you think about?

Which sentences are correct?

[Alan]

Yes, but #3 is awkward in tense - conversational acceptability only.
#4 possible but rather unnatural.