| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] has | 9009 |
|
| 2 | why [verb] | 8829 |
|
| 3 | why have | 1102 |
|
| 4 | why [vb -s] | 945 |
|
| 5 | [Wh adv] has | 388 |
|
| 6 | why has | 219 |
|
