| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [Wh det] happened to [art] | 9 |
|
| 2 | [adv] what happened to [art] | 9 |
|
| 3 | [adv] what happened to [art] | 9 |
|
| 4 | [adv] [pron] happened to the | 9 |
|
| 5 | [adv] [pron] happened to [art] | 9 |
|
| 6 | [adv] [pron] happened to [art] | 9 |
|
| 7 | [adv] [pron] happened to the | 9 |
|
| 8 | so [pron] happened to [art] | 5 |
|
