| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why could not [pron] [adv] [verb] | 14 |
|
| 2 | why could [not/n't] [pron] [adv] [verb] | 14 |
|
| 3 | why could [adv] [pron] [adv] [verb] | 14 |
|
| 4 | why could n't [pron] [adv] [verb] | 14 |
|
