| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [vb pp] [det] [noun] | 450 |
|
| 2 | must [be] [vb pp] [adj] [noun] | 81 |
|
| 3 | must [be] [verb] [det] [noun] | 45 |
|
| 4 | must [be] [vb pp] [det] [noun] | 33 |
|
