| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] why [verb] n't they | 10 |
|
| 2 | [coord] why do n't they | 9 |
|
| 3 | [coord] why did n't they | 6 |
|
| 4 | [coord] why [vb past] n't they | 6 |
|
| 5 | and why [verb] n't they | 5 |
|
| 6 | but why [verb] n't they | 5 |
|
