| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [verb] to | 2826 |
|
| 2 | who [vb past] to | 1627 |
|
| 3 | [pron] happened to | 1195 |
|
| 4 | who happen to | 111 |
|
| 5 | who happened [prep] | 58 |
|
