| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] [be] n't [verb] | 1255 |
|
| 2 | [conj] [pron] [be] [adv] happen | 36 |
|
| 3 | [conj] [pron] [be] not happen | 13 |
|
| 4 | [conj] [pron] [be] [not/n't] happen | 13 |
|
