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