| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [vb pp] to be | 31 |
|
| 2 | which have been [verb] to be | 31 |
|
| 3 | which has been [verb] to be | 14 |
|
| 4 | which have been shown to be | 13 |
|
| 5 | which have been show to be | 13 |
|
| 6 | which have been [verb] to be | 10 |
|
| 7 | which have been find to be | 7 |
|
| 8 | which had been [verb] to be | 7 |
|
| 9 | which have been found to be | 7 |
|
