| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [verb] | 691 |
|
| 2 | n't be [verb] [verb] | 329 |
|
| 3 | must n't be [verb] | 28 |
|
| 4 | must n't [verb] [verb] | 26 |
|
