| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [subord] [pron] [adv] happen | 6 |
|
| 2 | [conj] [subord] [pers pn] [adv] happen | 6 |
|
| 3 | [conj] [subord] [pron] [adv] happened | 6 |
|
