| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who just happened [prep] be | 6 |
|
| 2 | [Wh pn] just happened [prep] be | 6 |
|
| 3 | [Wh pn] just happened to be | 6 |
|
| 4 | [Wh pn] just happened [prep] be | 6 |
|
| 5 | [Wh pn] just happened [prep] be | 6 |
|
| 6 | [Wh pn] just happened to be | 6 |
|
