| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [verb] [prep] | 1975 |
|
| 2 | [subord] it have been [verb] | 1036 |
|
| 3 | [subord] it have [verb] [prep] | 491 |
|
| 4 | [subord] have been [verb] [prep] | 268 |
|
| 5 | [subord] it have been [prep] | 238 |
|
