| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh adv] [pron] happen [prep] be | 7 |
|
| 2 | [Wh adv] [pron] happen [prep] be [verb] | 7 |
|
| 3 | [Wh adv] [pron] happen [prep] be [prep] | 5 |
|
| 4 | [Wh adv] [pron] happen [prep] be [prep] | 5 |
|
