| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been written [prep] | 14 |
|
| 2 | [vb -s] to have been written [prep] | 7 |
|
| 3 | seem to have been written [prep] | 6 |
|
| 4 | appear to have been written [prep] | 5 |
|
| 5 | to have been written [prep] [noun] | 9 |
|
| 6 | to have been written [prep] [art] | 6 |
|
| 7 | to have been written [prep] [art] | 6 |
|
| 8 | to have been written [prep] [noun prp] | 6 |
|
