| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | previously been [vb pp] to be | 14 |
|
| 2 | previously be [vb pp] to be | 14 |
|
| 3 | previously be [vb pp] to be | 14 |
|
| 4 | previously be shown to be | 8 |
|
