| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [verb] | 7119 |
|
| 2 | which have been [verb] | 4625 |
|
| 3 | which [modal v] have [verb] | 1005 |
|
| 4 | which [modal v] have been | 707 |
|
