| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [Wh det] happened to | 59 |
|
| 2 | [adv] [Wh det] happened to | 44 |
|
| 3 | so [Wh det] [verb] to | 29 |
|
| 4 | so [Wh det] happen to | 26 |
|
| 5 | so [Wh det] happened [prep] | 26 |
|
| 6 | so [Wh det] [vb past] to | 20 |
|
| 7 | so [pron] happened to | 18 |
|
| 8 | so [Wh det] happened to | 18 |
|
