| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do [not/n't] happen | 481 |
|
| 2 | [verb] n't happen | 288 |
|
| 3 | did [not/n't] happen | 205 |
|
| 4 | [vb past] [not/n't] happen | 205 |
|
| 5 | [vb -s] [not/n't] happen | 204 |
|
| 6 | does [not/n't] happen | 204 |
|
| 7 | [verb] not happen | 193 |
|
| 8 | do [not/n't] happen | 72 |
|
| 9 | [vb base] [not/n't] happen | 72 |
|
