| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] what happened [prep] | 102 |
|
| 2 | know what happened [prep] | 92 |
|
| 3 | [adv] know what happened | 83 |
|
| 4 | [adv] know what [prep] | 24 |
|
