| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why not [vb infin] [conj] [vb infin] | 13 |
|
| 2 | why not [vb infin] [coord] [vb infin] | 13 |
|
| 3 | why not [vb infin] and [vb infin] | 13 |
|
| 4 | why not [vb infin] and [vb infin] | 13 |
|
