| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [verb] to a | 13 |
|
| 2 | which have been [vb pp] to a | 13 |
|
| 3 | which have been [verb] to a | 13 |
|
| 4 | which had been [verb] to a | 6 |
|
