| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] have been | 3771 |
|
| 2 | [vb mod] have been [prep] | 1264 |
|
| 3 | it have been [prep] | 611 |
|
| 4 | it [vb mod] have [prep] | 406 |
|
