| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have been [vb pp] over | 36 |
|
| 2 | which has been [verb] over | 16 |
|
| 3 | which have been [verb] over | 12 |
|
| 4 | which had been [verb] over | 12 |
|
| 5 | which have been developed over | 5 |
|
| 6 | which have been develop over | 5 |
|
