| 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 |
|
