ESERCIZIO 1:
1. We're lived her for ten years ago.
2. I've played the guitar since I was about 12.
3. I haven't seen Giorgio for months.
4. We've been married for about fifty years.
5. They've been here since 10 o'clock.
6. It hasn't rained for a few days.
7. No one has heard from Andy for his birthday.
8. I haven't seen Gemma for several weeks.

ESERCIZIO 2:
1. A: Hi, Jenny. I hacen't seen you for ages. How are you?
    B: I'm fine. And you?
2. A: Nice car! How long have you had it?
    B: For about six months.
3. A: How do you know Antonella?
    B: We've been friends for years. We have known each other since we were at primary school.
4. A: Where do you live?
    B: In Rome.
    A: Nice. Have you always lived In Rome?
    B: No, I'm from Milan originally.
    A: Oh, How long have you been iin Rome?
    B: I have been here for about ten years.
6. A: Would you like some chorizo?
    B: No, thanks. I don't actually eat meat. I'm vegetarian.
    A: I didn't know that. How loong have you been vegetarian?
    B: Well, I've never eaten meat, actually. I've been vegetarian all of my life.

ESERCIZIO 3:
1. Thomas and I have met friends since we were at elementary school.
2. It hasn't rained for about a month.
3. I have played classical music for a couple of years.
4. Polly has done ballet since she was twelve.
5. I have bought a CD for about two years.