| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] happened to [be] | 59 |
|
| 2 | [Wh pn] happened [prep] be | 59 |
|
| 3 | [Wh pn] happened to [be] | 59 |
|
| 4 | [Wh pn] happened [prep] [be] | 59 |
|
| 5 | who happened [prep] [be] | 56 |
|
