| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [pron] [adv] [vb infin] to | 10 |
|
| 2 | why [verb] [pers pn] [adv] [vb infin] to | 10 |
|
| 3 | why [verb] [pron] always [vb infin] to | 6 |
|
