| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [unc] why [verb] n't [pers pn] | 5 |
|
| 2 | [Wh adv] [no cls] why [verb] n't [pers pn] | 5 |
|
| 3 | [Wh adv] [unc] why do n't [pers pn] | 5 |
|
