| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [vb pp] | 5668 |
|
| 2 | have been [vb pp] [det] | 668 |
|
| 3 | it have [vb pp] [det] | 503 |
|
| 4 | it have been [det] | 111 |
|
