| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so why [vb past] n't you [verb] | 8 |
|
| 2 | so why [vb past] [not/n't] you [verb] | 8 |
|
| 3 | so why did [not/n't] you [verb] | 8 |
|
| 4 | so why [vb past] [not/n't] you [vb infin] | 8 |
|
