| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | changes have been [verb] in | 20 |
|
| 2 | changes have been [vb pp] in | 20 |
|
| 3 | changes have been [verb] in | 14 |
|
| 4 | changes have been make in | 11 |
|
| 5 | changes have been made in | 11 |
|
| 6 | changes had been [verb] in | 5 |
|
