| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | does [adv] happen | 213 |
|
| 2 | [vb -s] not happen | 204 |
|
| 3 | [vb -s] [not/n't] happen | 204 |
|
| 4 | [vb -s] n't happen | 122 |
|
| 5 | [vb -s] not happen | 82 |
|
| 6 | [vb -s] [adv] happen | 9 |
|
