| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] have been a | 29 |
|
| 2 | [vb past] to have been a | 25 |
|
| 3 | [vb past] had been a | 15 |
|
| 4 | [vb past] have been an | 13 |
|
| 5 | appeared have been a | 9 |
|
| 6 | seemed have been a | 6 |
|
