| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been many | 25 |
|
| 2 | [vb mod] have been many | 25 |
|
| 3 | must have been many | 20 |
|
| 4 | must have been many | 20 |
|
| 5 | would have been many | 5 |
|
| 6 | would have been many | 5 |
|
