| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] has changed | 45 |
|
| 2 | which have changed | 39 |
|
| 3 | what have changed | 39 |
|
| 4 | [Wh det] had changed | 18 |
|
| 5 | [Wh det] have changed | 9 |
|
| 6 | [Wh det] 's changed | 6 |
|
