| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] not happen | 11 |
|
| 2 | they do not happen | 11 |
|
| 3 | they [verb] n't happen | 7 |
|
| 4 | they did not happen | 6 |
|
| 5 | they [vb past] not happen | 6 |
|
| 6 | they do not happen | 5 |
|
| 7 | they [vb base] not happen | 5 |
|
