| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't [pos pn] | 7 |
|
| 2 | why do [adv] [pos pn] | 7 |
|
| 3 | why do not [pos pn] | 7 |
|
| 4 | why do [not/n't] [pos pn] | 7 |
|
