| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not have [vb pp] at a | 33 |
|
| 2 | [vb mod] not have come at a | 25 |
|
| 3 | [vb mod] n't have [vb pp] at a | 19 |
|
| 4 | [vb mod] not have [vb pp] at a | 14 |
|
