| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what [adv] happen | 38 |
|
| 2 | [vb past] [pron] [adv] happen | 18 |
|
| 3 | [vb past] what [adv] [verb] | 14 |
|
| 4 | [vb past] what [adv] happen | 5 |
|
| 5 | [vb past] [Wh det] [adv] happen | 5 |
|
