| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] ever happen to | 5 |
|
| 2 | [modal v] ever happen to | 5 |
|
| 3 | ever happen to [pron] | 7 |
|
| 4 | ever happen to [pers pn] | 6 |
|
