| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do [adv] happen [prep] | 18 |
|
| 2 | [vb base] [adv] happen [prep] | 18 |
|
| 3 | [vb base] not happen [prep] | 18 |
|
| 4 | [vb base] [not/n't] happen [prep] | 18 |
|
| 5 | [vb base] n't happen [prep] | 12 |
|
| 6 | [vb base] [adv] happen in | 8 |
|
| 7 | [vb base] [adv] happen in | 8 |
|
| 8 | [vb base] not happen [prep] | 6 |
|
