| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been prove to [be] | 20 |
|
| 2 | been prove to [be] | 20 |
|
| 3 | been prove to be | 20 |
|
| 4 | been prove to be | 20 |
|
| 5 | been proved to [be] | 15 |
|
| 6 | been proven to [be] | 5 |
|
