| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] n't [adv] | 9462 |
|
| 2 | [verb] n't happen | 288 |
|
| 3 | n't [adv] happen | 39 |
|
| 4 | [verb] [adv] happen | 16 |
|
