1.My grandfather works in the garden since he retired
2.I use this cream since i discovered it
3.She sells fruits and vegetables for five years
4.the factory produce these trainers for two years
5.My mum eats low calorie-food for six months
6.My sister does aerobics since last year
7.i don't eat fried meat since i began to follow a diet
8. Mary uses this toothpaste for a long time
9. his grandfather didn't smoke since he visited his heart doctor
10. She didn't drink strong tea for many years