Ответ:

1.is swimming, has been swimming

2.hasn't left, has been training

3.is...doing, is preparing, has been preparing

4.are still playing

5.hasn't finished,has been preparing

6.is playing, have been playing

7.have just heard

8.are...riding, are, have been riding

9.have been playing

10.have been traveling, have been

11.haven't been playing