| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] been [verb] [prep] a | 775 |
|
| 2 | to have been [verb] [prep] a | 162 |
|
| 3 | [adv] to have been [verb] [prep] | 76 |
|
| 4 | [adv] to have [verb] [prep] a | 15 |
|
