| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what happened [coord] [pron] [verb] | 8 |
|
| 2 | what [vb past] [coord] [pers pn] [verb] | 7 |
|
| 3 | what [vb past] and [pron] [verb] | 5 |
|
| 4 | what [vb past] [coord] [pron] [vb past] | 5 |
|
| 5 | what [vb past] but [pron] [verb] | 5 |
|
