| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [pron] [verb] [prep] [be] | 326 |
|
| 2 | [Wh adv] [pron] [vb past] [prep] [be] | 168 |
|
| 3 | [Wh adv] [pron] happen [prep] [be] | 20 |
|
| 4 | [adv] [pron] happened [prep] [be] | 18 |
|
