| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [vb pp] [prep] | 1838 |
|
| 2 | [subord] it have been [vb pp] | 986 |
|
| 3 | [subord] it have [vb pp] [prep] | 471 |
|
| 4 | [subord] have been [vb pp] [prep] | 265 |
|
| 5 | [subord] it have been [prep] | 238 |
|
