| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] happen to | 30 |
|
| 2 | [vb mod] never happen to | 14 |
|
| 3 | could [adv] happen to | 7 |
|
| 4 | would [adv] happen to | 7 |
|
| 5 | [vb mod] ever happen to | 5 |
|
