| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] happened [prep] [noun] | 343 |
|
| 2 | [Wh det] [adv] happened [prep] | 50 |
|
| 3 | [adv] happened [prep] [noun] | 44 |
|
| 4 | [Wh det] [adv] [prep] [noun] | 34 |
|
