| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this has been [vb pp] [prep] a | 45 |
|
| 2 | this has be [vb pp] by a | 12 |
|
| 3 | this has be [vb pp] in a | 11 |
|
| 4 | this has be [vb pp] as a | 8 |
|
