| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] what [verb] | 113 |
|
| 2 | [verb] [pron] what happened | 88 |
|
| 3 | [vb past] [pron] what [vb past] | 74 |
|
| 4 | [vb past] [pron] [pron] happened | 10 |
|
| 5 | [vb past] [pron] what happen | 9 |
|
| 6 | [vb past] [pron] what happened | 9 |
|
| 7 | [vb past] [pron] [Wh det] happened | 9 |
|
