| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb base] n't they [vb infin] [adv] | 6 |
|
| 2 | why do [not/n't] they [vb infin] [adv] | 6 |
|
| 3 | why [vb base] [not/n't] they [vb infin] [adv] | 6 |
|
| 4 | why [vb base] [not/n't] they [vb infin] [adv prt] | 5 |
|
