| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [be] [prep] [adj] | 51 |
|
| 2 | must [verb] [be] [prep] [det] | 26 |
|
| 3 | [modal v] [verb] [be] [prep] some | 18 |
|
| 4 | must [verb] [be] [prep] some | 6 |
|
