| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [prep] | 1264 |
|
| 2 | [vb mod] n't have been | 624 |
|
| 3 | [vb mod] n't have [prep] | 60 |
|
| 4 | n't have been [prep] | 43 |
|
