Автор - shumpty13
1) are cleaning, has been dusting, has just finished
2) is reading, has been reading, hasn't finished
3) Have you seen, is having, have been sitting
4) has Elizabeth been attending, has been attending, has already learned
5) is, is making, is taking, has been preparing
6) Have you been, are going, has already booked
7) is, is, is drying, has been drying, haven't washed
8) have you been living, have been living (have lived тоже подходит, т.к действие на протяжении длительного времени), have just finished
9) Has Pam found, hasn't, has been looking
10) are Greg and Den doing, are fixing, have been working