| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] to be | 279 |
|
| 2 | has been [vb pp] to be | 279 |
|
| 3 | [verb] been known to be | 9 |
|
| 4 | have been known to be | 9 |
|
| 5 | has been known to be | 6 |
|
| 6 | has [been] known to be | 6 |
|
| 7 | has [be] known to be | 6 |
|
| 8 | has been known to [be] | 6 |
|
| 9 | has been know to be | 6 |
|
| 10 | has be known to be | 6 |
|
| 11 | has been known to be | 6 |
|
| 12 | [vb -s] been known to be | 6 |
|
| 13 | has been known [prep] be | 6 |
|
| 14 | has been known to [be] | 6 |
|
| 15 | has been known [prep] be | 6 |
|
