| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [verb] [pers pn] [not/n't] [vb infin] to | 5 |
|
| 2 | why [verb] [pron] not [vb infin] to | 5 |
|
| 3 | why do [pron] [not/n't] [vb infin] to | 5 |
|
