| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] to be a | 46 |
|
| 2 | have been [verb] to be a | 41 |
|
| 3 | has been [verb] to be a | 34 |
|
| 4 | have been shown to be a | 14 |
|
| 5 | have been show to be a | 14 |
|
| 6 | have been find to be a | 7 |
|
| 7 | have been [verb] to be an | 7 |
|
| 8 | have been found to be a | 7 |
|
| 9 | have been held to be a | 5 |
|
| 10 | have been hold to be a | 5 |
|
| 11 | have been [verb] to be a | 5 |
|
