| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [not/n't] [verb] [adv] [adv] | 14 |
|
| 2 | why [not/n't] [vb infin] [adv] [adv] | 11 |
|
| 3 | why [not/n't] [adv] [verb] [adv] | 5 |
|
