| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] to | 7339 |
|
| 2 | [Wh det] [vb past] to | 3278 |
|
| 3 | [Wh det] happened [prep] | 1416 |
|
| 4 | [Wh det] happen to | 1292 |
|
| 5 | [pron] happened to | 1195 |
|
