| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] prove to be | 19 |
|
| 2 | [verb] [been] prove to be | 19 |
|
| 3 | [vb -s] [been] prove to be | 10 |
|
| 4 | has [been] prove to be | 10 |
|
| 5 | [vb base] [been] prove to be | 7 |
|
| 6 | have [been] prove to be | 7 |
|
| 7 | [been] prove to be [adj] | 8 |
|
| 8 | [been] prove to be [adj] | 8 |
|
