| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [adv] [verb] to | 252 |
|
| 2 | [Wh pn] [adv] [vb past] to | 139 |
|
| 3 | [pron] [adv] happened to | 71 |
|
| 4 | [Wh pn] [adv] happen to | 17 |
|
| 5 | [Wh pn] [adv] happened [prep] | 9 |
|
