| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] why do [not/n't] they | 17 |
|
| 2 | [adv] why do [adv] they | 17 |
|
| 3 | [adv] why do not they | 17 |
|
| 4 | [adv] why do n't they | 17 |
|
| 5 | [adv] why do they [vb infin] | 28 |
|
| 6 | [adv] why do they [verb] | 28 |
|
| 7 | [adv] why do they [adv] | 5 |
|
