| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adv] what happened to [pron] | 5 |
|
| 2 | [is] [adv] what happened to [pron] | 5 |
|
| 3 | be [adv] what happened to [pron] | 5 |
|
| 4 | [adv] [verb] what happened to [pron] | 9 |
|
| 5 | [adv] know what happened to [pron] | 5 |
|
| 6 | [adv] [prep] what happened to [pron] | 5 |
|
| 7 | [adv] [prep] what happened to [pron] | 5 |
|
| 8 | [adv] what happened to [pron] [adj] | 5 |
|
