| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] have been [prep] | 230 |
|
| 2 | [modal v] have been [prep] [det] | 105 |
|
| 3 | it [modal v] have been [det] | 82 |
|
| 4 | it have been [prep] [det] | 46 |
|
