| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] to have [been] [vb pp] by | 174 |
|
| 2 | to have [been] [vb pp] by [noun] | 160 |
|
| 3 | [vb pp] to have [been] [vb pp] [noun] | 8 |
|
