| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [verb] n't [vb infin] | 19 |
|
| 2 | why do not [vb infin] | 19 |
|
| 3 | why [verb] not [vb infin] | 19 |
|
| 4 | why [vb base] not [vb infin] | 13 |
|
| 5 | why do not [vb infin] | 13 |
|
