| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [be] in [pron] | 47 |
|
| 2 | must [verb] [be] [prep] [pron] | 35 |
|
| 3 | must [verb] [be] [prep] [pron] | 35 |
|
| 4 | must [verb] [be] in [pron] | 11 |
|
