| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb past] to be | 896 |
|
| 2 | [Wh det] prove to be | 84 |
|
| 3 | [vb past] prove to be | 51 |
|
| 4 | [Wh det] [vb past] prove to | 5 |
|
