1. Your hands are covered in oil. Have you been working on the car?
2. I’m writing an email to my best friend. I’ve known him for at least 20 years.
3. No, I haven’t been peeling onions. I’ve got a bad cold.
4. I’ve been waiting for the chance to move to a bigger flat for a long time.
5. He’s been doing Karate for three years now. He's won a lot of competitions since he started.
6. I won't be able to go snowboarding next month. I've broken my leg.
7. I’ve disliked carrots ever since I was a child.
8. How long has your wife been working for a lawyer?