| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been [v-ing] a | 11 |
|
| 2 | [vb past] to have been [v-ing] a | 5 |
|
| 3 | to have been [v-ing] a [noun] | 7 |
|
| 4 | to have been [v-ing] a [noun sg] | 7 |
|
