| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [verb] | 40184 |
|
| 2 | [vb past] [verb] an | 2881 |
|
| 3 | [vb past] been an | 517 |
|
| 4 | been [verb] an | 346 |
|
