| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb past] not [pron] [verb] | 674 |
|
| 2 | [vb past] not [pron] [adv] [verb] | 157 |
|
| 3 | why [vb past] [pron] [adv] [verb] | 70 |
|
| 4 | why [vb past] not [pron] [adv] | 44 |
|
