| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not have been [noun prp] | 10 |
|
| 2 | [vb mod] not have been [noun prp] | 10 |
|
| 3 | not have been [prep] [noun prp] | 5 |
|
| 4 | not have been [prep] [noun prp] | 5 |
|
