| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] by some [noun] | 28 |
|
| 2 | has been [verb] by some [noun] | 28 |
|
| 3 | has been [verb] by some [noun pl] | 22 |
|
| 4 | has been [verb] by some writers | 5 |
|
| 5 | has been [verb] by some writer | 5 |
|
