| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have changed | 184 |
|
| 2 | [modal v] have changed | 181 |
|
| 3 | may have changed | 59 |
|
| 4 | may have changed | 59 |
|
| 5 | would have changed | 40 |
|
| 6 | would have changed | 39 |
|
| 7 | will have changed | 29 |
|
| 8 | will have changed | 26 |
|
| 9 | must have changed | 20 |
|
| 10 | must have changed | 20 |
|
| 11 | might have changed | 17 |
|
| 12 | might have changed | 17 |
|
| 13 | could have changed | 11 |
|
| 14 | could have changed | 11 |
|
| 15 | should have changed | 6 |
|
| 16 | should have changed | 6 |
|
