| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [not/n't] [vb pp] at | 39 |
|
| 2 | has n't [verb] at | 20 |
|
| 3 | has not [verb] at | 19 |
|
| 4 | has [not/n't] change at | 10 |
|
| 5 | has [not/n't] changed at | 10 |
|
