| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to have been | 21 |
|
| 2 | to [v-ing] been | 13 |
|
| 3 | to having been | 13 |
|
| 4 | to had been | 6 |
|
| 5 | to [vb past] been | 6 |
|
