| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] not happen | 75 |
|
| 2 | [vb base] [not/n't] happen | 75 |
|
| 3 | [vb base] [adv] happen | 74 |
|
| 4 | do [adv] happen | 74 |
|
| 5 | [vb base] n't happen | 58 |
|
| 6 | [vb base] not happen | 17 |
|
| 7 | [vb base] [adv] happen | 16 |
|
| 8 | have [adv] happen | 9 |
|
| 9 | [vb base] [adv] happened | 8 |
|
| 10 | [vb base] [adv] happens | 5 |
|
