| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [Wh det] | 18803 |
|
| 2 | why [pron] | 11807 |
|
| 3 | [Wh adv] [Wh det] | 250 |
|
| 4 | why [Wh det] | 105 |
|
