| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] proved to be [adj] | 12 |
|
| 2 | [vb past] proved [prep] be [adj] | 12 |
|
| 3 | [vb past] proved to be [adj] | 12 |
|
| 4 | had proved [prep] be [adj] | 10 |
|
