| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [prep] | 1264 |
|
| 2 | which [modal v] have been | 707 |
|
| 3 | which have been [prep] | 225 |
|
| 4 | which [modal v] have [prep] | 89 |
|
