| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] | 12065 |
|
| 2 | must [verb] [be] | 3545 |
|
| 3 | [be] [verb] [be] | 1576 |
|
| 4 | must [be] [be] | 8 |
|
