| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what happened [prep] [noun prp] | 12 |
|
| 2 | [adv] what happened [prep] [noun prp] | 12 |
|
| 3 | [adv] what [verb] to [noun prp] | 8 |
|
| 4 | [adv] [Wh det] happened to [noun prp] | 8 |
|
| 5 | [adv] [pron] happened to [noun prp] | 8 |
|
| 6 | [adv] what happen to [noun prp] | 7 |
|
| 7 | [adv] what happened to [noun] | 7 |
|
| 8 | [adv] what happened to [noun prp] | 7 |
|
| 9 | [adv] what [vb past] to [noun prp] | 6 |
|
| 10 | [adv] what happened to [noun prp] | 6 |
|
| 11 | [adv] what happened to [noun prp] | 6 |
|
