| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why has not [pers pn] [vb pp] | 8 |
|
| 2 | why [vb -s] n't [pers pn] [vb pp] | 8 |
|
| 3 | why [vb -s] not he [vb pp] | 5 |
|
