| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of which [vb mod] have been | 23 |
|
| 2 | [prep] which would have been | 9 |
|
| 3 | [prep] which must have been | 6 |
|
| 4 | [prep] which may have been | 5 |
|
