| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do not happen | 482 |
|
| 2 | [verb] not happen | 481 |
|
| 3 | [verb] n't happen | 389 |
|
| 4 | [vb -s] not happen | 297 |
|
| 5 | [vb past] not happen | 267 |
|
| 6 | [verb] not happen | 252 |
|
| 7 | does not happen | 205 |
|
| 8 | did not happen | 205 |
|
| 9 | [verb] not happened | 157 |
|
| 10 | have not happen | 156 |
|
| 11 | has not happen | 87 |
|
| 12 | [vb base] not happen | 75 |
|
| 13 | do not happen | 72 |
|
| 14 | had not happen | 61 |
|
