| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [pron] [vb infin] | 2710 |
|
| 2 | [adv] do they [vb infin] | 990 |
|
| 3 | why do they [verb] | 265 |
|
| 4 | why [verb] they [vb infin] | 264 |
|
