| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [vb pp] a [noun sg] | 514 |
|
| 2 | must [be] [vb pp] [art] [noun sg] | 71 |
|
| 3 | must [be] [verb] a [noun sg] | 54 |
|
| 4 | must [be] [vb pp] a [noun] | 27 |
|
| 5 | must [be] [vb pp] a [noun sg] | 26 |
|
