| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] previously be shown to be | 8 |
|
| 2 | have previously be shown to be | 8 |
|
| 3 | [vb -s] previously be shown to be | 7 |
|
| 4 | has previously be shown to be | 7 |
|
