1 have you seen-saw-think-is
2 have got- think-are waiting
3 what is he doing-is playing-bought
4 has been walking
5 rang,answered,rang off
6 have discovered,have evacuated
7 looked,got,had
8 had been working-fell
9 have you been-was-was running
10 wouldn't have come
11 watched-were killing
12 began-is still doing-when will she finish
13 am not-will have written
14 were helping-came-invited
15 have removed-covered
16 what had you achieved