1) were
2) doesn't is, works
3) didn't know
4) is worrying, aren't being
5) was, had
6) am going
7) are
8) are
9) did, was, am not knowing
10) Where are you going?, am going, is taking
11) Did you know, took
12) went
13) was, enjoyed
14) won
15) where is Boris?, is playing