| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been [det] [noun] | 50 |
|
| 2 | it [verb] been [det] [noun] | 42 |
|
| 3 | it must [verb] been [noun] | 41 |
|
| 4 | it must [verb] [det] [noun] | 30 |
|
| 5 | it must [verb] been [det] | 26 |
|
