| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] n't | 83949 |
|
| 2 | [modal v] n't | 83949 |
|
| 3 | must [adv] | 7872 |
|
| 4 | must not | 2791 |
|
| 5 | must [not/n't] | 2791 |
|
| 6 | must n't | 910 |
|
