| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [vb pp] [prep] [det] | 612 |
|
| 2 | [vb past] to have been [vb pp] [prep] | 189 |
|
| 3 | to have been [vb pp] [prep] [det] | 88 |
|
| 4 | [vb past] to have [vb pp] [prep] [det] | 9 |
|
