| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [vb pp] [prep] [art] [noun] | 1340 |
|
| 2 | must [be] [vb pp] [prep] [art] [noun] | 1340 |
|
| 3 | [vb mod] [be] [vb pp] on [art] [noun] | 1281 |
|
| 4 | [modal v] [be] [vb pp] on [art] [noun] | 1281 |
|
| 5 | must [be] [verb] on [art] [noun] | 73 |
|
| 6 | must [be] [vb pp] on [art] [noun] | 69 |
|
| 7 | must [be] [vb pp] on [art] [noun] | 69 |
|
| 8 | must [be] [vb pp] on [art] [noun] | 69 |
|
