| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what it [modal v] have been [prep] | 20 |
|
| 2 | what it [vb mod] have been [prep] | 20 |
|
| 3 | what it [modal v] have been like | 18 |
|
| 4 | what it must have been [prep] | 13 |
|
| 5 | what it must have been [prep] | 13 |
|
| 6 | what it would have been [prep] | 7 |
|
| 7 | what it would have been [prep] | 7 |
|
