| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must be [verb] | 6921 |
|
| 2 | of [noun] must be | 489 |
|
| 3 | of [noun] must [verb] | 304 |
|
| 4 | of [noun] be [verb] | 297 |
|
