| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not have been [adj] | 471 |
|
| 2 | which [modal v] have been [adj] | 141 |
|
| 3 | which [modal v] not have been | 68 |
|
| 4 | which [modal v] not have [adj] | 5 |
|
