| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so why [vb past] n't [pron] [verb] | 18 |
|
| 2 | so why [vb past] not [pers pn] [verb] | 18 |
|
| 3 | so why [vb past] not [pron] [vb infin] | 16 |
|
| 4 | so why did not [pron] [verb] | 16 |
|
| 5 | so why [vb past] not you [verb] | 8 |
|
| 6 | so why [vb past] not you [verb] | 8 |
|
