| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] been a [noun] | 948 |
|
| 2 | [noun] must [verb] a [noun] | 331 |
|
| 3 | must [verb] been a [noun] | 181 |
|
| 4 | [noun] must [verb] been a | 81 |
|
| 5 | [noun] must [verb] been [noun] | 16 |
|
