| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] is [verb] [prep] [noun] | 1246 |
|
| 2 | [Wh det] [be] happen [prep] [noun] | 184 |
|
| 3 | [Wh det] be happen [prep] [noun] | 184 |
|
| 4 | [Wh det] [is] happen [prep] [noun] | 116 |
|
| 5 | [pron] is happen [prep] [noun] | 78 |
|
