| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been written [prep] [noun] | 33 |
|
| 2 | to have been written [prep] [noun] | 9 |
|
| 3 | [vb -s] to have been [prep] [noun] | 8 |
|
| 4 | [vb -s] to have been written [prep] | 7 |
|
