| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] what [vb past] happen | 70 |
|
| 2 | [adv] what [vb past] happen | 56 |
|
| 3 | [pron] [adv] what [vb past] | 19 |
|
| 4 | [pron] [adv] [vb past] happen | 16 |
|
| 5 | [pron] [adv] what happen | 11 |
|
