| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [not/n't] be [verb] | 548 |
|
| 2 | [modal v] [not/n't] be leave | 128 |
|
| 3 | must [adv] be leave | 26 |
|
| 4 | must [not/n't] [be] leave | 15 |
|
| 5 | must [not/n't] be leave | 15 |
|
| 6 | must [not/n't] [be] leave | 15 |
|
