| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | changes have been | 140 |
|
| 2 | changes have been | 102 |
|
| 3 | changes [vb base] been | 102 |
|
| 4 | changes [vb past] been | 27 |
|
| 5 | changes had been | 27 |
|
| 6 | changes has been | 11 |
|
| 7 | changes [vb -s] been | 11 |
|
