| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb mod] have seen | 46 |
|
| 2 | who may have seen | 30 |
|
| 3 | who may have seen | 30 |
|
| 4 | who might have seen | 9 |
|
| 5 | who might have seen | 9 |
|
