| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what happened [prep] the | 23 |
|
| 2 | [adv] what happen to the | 17 |
|
| 3 | [adv] what [verb] to the | 17 |
|
| 4 | [adv] what happened to the | 11 |
|
| 5 | [adv] what happened to [art] | 9 |
|
| 6 | [adv] what [vb past] to the | 9 |
|
| 7 | [adv] [Wh det] happened to the | 9 |
|
| 8 | [adv] what happened to the | 9 |
|
| 9 | [adv] [pron] happened to the | 9 |
|
