| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been a [noun] | 181 |
|
| 2 | [adj] [verb] been a [noun] | 123 |
|
| 3 | [adj] must [verb] a [noun] | 26 |
|
| 4 | [adj] must [verb] been a | 26 |
|
| 5 | [adj] must [verb] been [noun] | 11 |
|
