I've been/i was very busy this month, so i didn't see/haven't seen any of my friends for about three weeks. i had/have had a lot of homework last weekend, so i haven't gone out/didn't go out with my friends then, and the week before that, i have gone/went to work for my dad after school – i wanted to earn some extra money. but it's thursday now, and i've already finished/i have finished already this week's homework. i just have phoned/'ve just phoned my friend raymond. he hasn't made any plans yet/hasn't made yet any plans for saturday, so we're going to meet up then.
2. had, didn't go out, went
3. I have already finished
4. I have just phoned
5. He hasn't made any plans yet