| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [verb] to | 2869 |
|
| 2 | [Wh pn] [vb past] to | 1645 |
|
| 3 | [pron] happened to | 1195 |
|
| 4 | [Wh pn] happen to | 118 |
|
| 5 | [Wh pn] happened [prep] | 61 |
|
