| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been in a [noun] | 181 |
|
| 2 | must [verb] been a [noun] | 181 |
|
| 3 | must [verb] been in [noun] | 20 |
|
| 4 | must [verb] in a [noun] | 11 |
|
| 5 | must [verb] been in a | 10 |
|
