| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have seen | 139 |
|
| 2 | would have seen | 121 |
|
| 3 | may have seen | 114 |
|
| 4 | should have seen | 112 |
|
| 5 | will have seen | 69 |
|
| 6 | might have seen | 55 |
|
| 7 | could have seen | 51 |
|
| 8 | 'd have seen | 24 |
|
| 9 | 'll have seen | 16 |
|
