| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] to have been [verb] [prep] a | 7 |
|
| 2 | [adv] to have [been] [vb pp] [prep] a | 7 |
|
| 3 | [adv] to have [been] [verb] [prep] a | 5 |
|
