| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] [prep] | 5095 |
|
| 2 | [be] [adj] [verb] [prep] | 3753 |
|
| 3 | must [be] [adj] [prep] | 1038 |
|
| 4 | must [be] [adj] [verb] | 662 |
|
