| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have happened to | 598 |
|
| 2 | [pron] have [adv] happened | 197 |
|
| 3 | [pron] have [adv] to | 166 |
|
| 4 | have [adv] happened to | 68 |
|
