| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] [pron] | 109 |
|
| 2 | [be] [prep] [pron] [verb] | 108 |
|
| 3 | must [be] [prep] [verb] | 39 |
|
| 4 | must [be] [pron] [verb] | 38 |
|
