| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have already been [verb] by | 25 |
|
| 2 | which have already been [vb pp] by | 25 |
|
| 3 | which had already been [verb] by | 10 |
|
| 4 | which has already been [verb] by | 9 |
|
| 5 | which have already been [verb] by | 6 |
|
