| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been [verb] | 29977 |
|
| 2 | [vb base] [verb] an | 2357 |
|
| 3 | been [verb] an | 346 |
|
| 4 | [vb base] been an | 68 |
|
