| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have previously been [vb pp] to be | 13 |
|
| 2 | [verb] previously been [vb pp] to be | 13 |
|
| 3 | [vb -s] previously been [vb pp] to be | 10 |
|
| 4 | has previously been [vb pp] to be | 10 |
|
| 5 | previously been [vb pp] to be [adj] | 6 |
|
| 6 | previously been [vb pp] to be [adj] | 5 |
|
