| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] to be | 764 |
|
| 2 | be prove to be | 143 |
|
| 3 | [be] prove to be | 143 |
|
| 4 | been prove to [be] | 20 |
|
| 5 | been prove [prep] be | 20 |
|
| 6 | been prove to be | 20 |
|
| 7 | been prove [prep] be | 20 |
|
| 8 | [been] prove to be | 20 |
|
