| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [adv] [verb] [prep] | 1888 |
|
| 2 | [Wh det] [adv] [vb past] [prep] | 790 |
|
| 3 | [pron] [adv] happened [prep] | 111 |
|
| 4 | [Wh det] [adv] happen [prep] | 102 |
|
| 5 | [Wh det] [adv] happened [prep] | 50 |
|
