| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] by | 12653 |
|
| 2 | been [vb pp] by a | 1681 |
|
| 3 | have been [vb pp] a | 1230 |
|
| 4 | have [vb pp] by a | 110 |
|
