| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] to be | 2346 |
|
| 2 | [Wh det] [vb past] to be | 896 |
|
| 3 | [pron] happened to be | 236 |
|
| 4 | [Wh det] happen to be | 59 |
|
| 5 | [Wh det] happened to [be] | 18 |
|
| 6 | [Wh det] happened [prep] be | 18 |
|
