| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [pers pn] [modal v] not happen | 6 |
|
| 2 | [vb base] it [modal v] not happen | 6 |
|
| 3 | [vb base] [pron] [vb mod] not happen | 6 |
|
| 4 | [vb base] it [modal v] not happen | 6 |
|
| 5 | [vb base] [pron] [modal v] not happen | 6 |
|
| 6 | [vb base] [pron] [modal v] n't happen | 5 |
|
