| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh pn] happen [prep] [be] | 52 |
|
| 2 | [noun] [adv] happen [prep] [be] | 32 |
|
| 3 | [Wh pn] [adv] happen [prep] [be] | 17 |
|
| 4 | [noun] [Wh pn] [adv] happen [prep] | 11 |
|
