| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do not [det] [vb infin] | 7 |
|
| 2 | why [verb] not [det] [vb infin] | 7 |
|
| 3 | why [verb] n't [det] [vb infin] | 6 |
|
| 4 | why does not [det] [vb infin] | 5 |
|
| 5 | why [vb -s] not [det] [vb infin] | 5 |
|
