| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [not/n't] [vb infin] | 19 |
|
| 2 | why do not [vb infin] | 19 |
|
| 3 | why do n't [vb infin] | 19 |
|
| 4 | why do [adv] [vb infin] | 15 |
|
| 5 | why does [adv] [vb infin] | 5 |
|
