| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pron] happen to | 254 |
|
| 2 | [pron] [adv] happen to | 158 |
|
| 3 | [subord] [pron] [adv] happen | 90 |
|
| 4 | [subord] [pron] [adv] to | 14 |
|
