| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [not/n't] [verb] | 909 |
|
| 2 | then why [verb] | 174 |
|
| 3 | then why [not/n't] | 45 |
|
| 4 | then [not/n't] [verb] | 44 |
|
