| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it [modal v] have been | 340 |
|
| 2 | [subord] it have been [prep] | 238 |
|
| 3 | it [modal v] have been [prep] | 230 |
|
| 4 | [subord] it [modal v] have [prep] | 25 |
|
