| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] [verb] [prep] | 1535 |
|
| 2 | [Wh det] [verb] happen [prep] | 828 |
|
| 3 | [pron] [vb -s] happen [prep] | 555 |
|
