| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [pron] happen [prep] | 176 |
|
| 2 | [coord] [unc] [pron] [prep] | 34 |
|
| 3 | [unc] [pron] happen [prep] | 24 |
|
| 4 | [coord] [unc] [pron] happen | 13 |
|
