| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] [prep] [noun] | 1158 |
|
| 2 | must [be] [verb] [prep] [noun sg] | 808 |
|
| 3 | [modal v] [be] [verb] [prep] mind | 179 |
|
| 4 | must [be] [verb] [prep] mind | 61 |
|
