| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] have been | 3771 |
|
| 2 | [modal v] have been [det] | 370 |
|
| 3 | it have been [det] | 111 |
|
| 4 | it [modal v] have [det] | 104 |
|
