| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [not/n't] [verb] out | 10 |
|
| 2 | why [not/n't] [verb] out | 10 |
|
| 3 | why not [verb] out | 10 |
|
| 4 | why [not/n't] [vb infin] out | 9 |
|
