| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been a | 3172 |
|
| 2 | [vb past] a [det] | 1542 |
|
| 3 | [vb past] been [det] | 569 |
|
| 4 | been a [det] | 74 |
|
