| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb mod] happen to | 375 |
|
| 2 | about [pron] [vb mod] happen | 82 |
|
| 3 | about [pron] happen to | 37 |
|
| 4 | about [pron] [vb mod] to | 5 |
|
