| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [modal v] not [pers pn] | 782 |
|
| 2 | why [vb mod] not [pers pn] | 782 |
|
| 3 | [adv] could not [pers pn] | 200 |
|
| 4 | why could not [pron] | 139 |
|
| 5 | why could [adv] [pers pn] | 135 |
|
| 6 | why could not [pers pn] | 134 |
|
