| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [pron] happen to | 12 |
|
| 2 | should [pron] happen to | 10 |
|
| 3 | should [pron] happen to | 10 |
|
| 4 | [modal v] [pers pn] happen to | 8 |
|
| 5 | [modal v] it happen to | 5 |
|
| 6 | [modal v] it happen to | 5 |
|
