| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] | 27371 |
|
| 2 | why [pron] [adv] | 288 |
|
| 3 | why could [adv] | 182 |
|
| 4 | why [pron] could | 123 |
|
