| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what happen [prep] | 483 |
|
| 2 | what is happen [prep] | 319 |
|
| 3 | [verb] what is happen | 189 |
|
| 4 | [verb] what is [prep] | 189 |
|
| 5 | [verb] is happen [prep] | 5 |
|
