Определить в предложениях видовременные формы глаголы и указать их инфинитив .
1) buckingham palase, which is tobay the official resident of the british monarchy, has served that function only since comparatively recent times.
2)there are a lot of banks,firms and various offices here.
3)few people like in this part of london but over a million come here to work.
4) at the begginning, the tower of london served as fortress and palace.
2. I have studied English twice a week since childhood
3. It has been powered by the company three days a week for two years
4. They have gone to the store every Saturday since they moved here
5. We have meet each other sometimes for many years
6. I have known this man now since we went to school
7. I've been here every day since 9 o'clock
8. He has played football once a week since early childhood
9. He has driven a car now since he got the driving license
10. They have received letters from him regularly since last spring