| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what [verb] [be] | 124 |
|
| 2 | [adv] what [vb past] [be] | 42 |
|
| 3 | [adv] what happen [be] | 36 |
|
| 4 | [adv] [pron] happened [be] | 21 |
|
| 5 | [adv] what happened [be] | 19 |
|
| 6 | [adv] [Wh det] happened [be] | 19 |
|
