| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [adv] [noun prp] | 23 |
|
| 2 | why not [noun prp] | 19 |
|
| 3 | why [not/n't] [noun prp] | 19 |
|
| 4 | why not [noun prp] | 19 |
|
