| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must [be] | 11000 |
|
| 2 | work [vb mod] [be] | 682 |
|
| 3 | work [modal v] [be] | 682 |
|
| 4 | work must [be] | 40 |
|
