1. He has been in the class since September.
2. We've got on very well for three years.
3. I've loved reading books since I was a child.
4. They've been heavy smokers since last summer
5. He's lost touch with lots of his colleagues since he left college.
6. Since he got engaged, he's been so happy.
7. I've been eating healthily since I started training for the marathon.
8. She earned good salary since she had started her new job.