| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] n't [verb] | 135186 |
|
| 2 | [verb] n't [vb infin] | 120443 |
|
| 3 | [verb] [adv] happen | 497 |
|
| 4 | [verb] [not/n't] happen | 481 |
|
| 5 | [verb] not happen | 481 |
|
| 6 | [verb] n't happen | 389 |
|
