| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] [pers pn] [verb] | 601 |
|
| 2 | then why did [pers pn] [verb] | 39 |
|
| 3 | then why did [not/n't] [pers pn] | 19 |
|
