| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [prep] | 1243 |
|
| 2 | [modal v] n't have been | 620 |
|
| 3 | [modal v] n't have [prep] | 60 |
|
| 4 | n't have been [prep] | 38 |
|
