| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [verb] for | 5399 |
|
| 2 | must [verb] been [verb] | 793 |
|
| 3 | must [verb] [verb] for | 55 |
|
| 4 | must [verb] been for | 14 |
|
