| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] [noun sg] [verb] | 19 |
|
| 2 | must [be] [prep] [noun sg] [verb] | 19 |
|
| 3 | [modal v] [be] for [noun sg] [verb] | 15 |
|
| 4 | must [be] for [noun] [verb] | 7 |
|
| 5 | must [be] for [noun sg] [verb] | 6 |
|
