| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] | 58901 |
|
| 2 | to have been [vb pp] | 2668 |
|
| 3 | to have [vb pp] [prep] | 2300 |
|
| 4 | to have been [prep] | 289 |
|
