1. You have been trying this all timе какое время?

Present Perfect Progressive

1.they are in the school, aren't they?  

2.they aren't at home? are they?  

3.they do exercises, don't they?  

4.she can sing, can't she?  

5.he doesn't like soup, does he?  

6.there are a little bear, aren't there?  

7.it is a cake, ian't it?  

8.you will go to the cinema, won't you?  

9.you can't swim, can you?