| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [num] [noun] | 496 |
|
| 2 | must [verb] been [noun] | 120 |
|
| 3 | must [verb] [num] [noun] | 117 |
|
| 4 | must [verb] been [num] | 98 |
|
