| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [verb] not [pron] [vb infin] | 1963 |
|
| 2 | [coord] [verb] not [pron] [vb infin] | 240 |
|
| 3 | [coord] why [verb] [pron] [vb infin] | 200 |
|
| 4 | [coord] why [verb] not [pron] | 82 |
|
