| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] why [vb past] n't they [vb infin] | 6 |
|
| 2 | [conj] [Wh adv] did n't they [vb infin] | 6 |
|
| 3 | [coord] [Wh adv] [vb past] n't they [vb infin] | 5 |
|
