| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb mod] n't the [noun sg] | 24 |
|
| 2 | why ca n't the [noun sg] | 7 |
|
| 3 | why could n't the [noun sg] | 7 |
|
| 4 | why should n't the [noun sg] | 6 |
|
