| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [be] [verb] [conj] | 634 |
|
| 2 | must [not/n't] [be] [verb] [conj] | 75 |
|
| 3 | it must [not/n't] [be] [verb] | 74 |
|
| 4 | it [not/n't] [be] [verb] [conj] | 8 |
|
