| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb mod] [not/n't] this [noun] | 8 |
|
| 2 | why [modal v] [not/n't] this [noun] | 8 |
|
| 3 | why [modal v] n't this [noun] | 7 |
|
| 4 | why [modal v] [not/n't] this [noun sg] | 7 |
|
