1. They have studied English for two years.
2. She has worked in this bank for three months.
3. Minh started living in this village several years ago.
4. The baby has slept for an hour.
5. I started working as a salesman a year ago.
6. They have built this road since last week.
7. Phong began doing his homework when his father went to work.
8. He has cried since his mother shouted at him.
9. Because of their old age, they cannot drive a car./If they were old enough, they could drive a car.
10. Due to his bad behavior, they were a little impatient./ His bad behavior made them a little impatient.