| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | change which have [vb pp] | 49 |
|
| 2 | changes which have [verb] | 48 |
|
| 3 | change which have taken | 23 |
|
| 4 | change which have take | 23 |
|
| 5 | change which have occurred | 15 |
|
| 6 | change which have occur | 15 |
|
