| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [not/n't] [pers pn] sell | 8 |
|
| 2 | why [verb] n't [pers pn] sell | 8 |
|
| 3 | why [vb base] [not/n't] [pers pn] sell | 6 |
|
| 4 | why do [not/n't] [pers pn] sell | 6 |
|
