| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [noun] [noun] | 109 |
|
| 2 | must [be] [noun prp] [noun] | 70 |
|
| 3 | [modal v] [be] mr [noun] | 24 |
|
| 4 | must [be] mr [noun] | 6 |
|
| 5 | must [be] mr [noun] | 6 |
|
