| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] do [adv] | 7172 |
|
| 2 | why [verb] [adv] | 2976 |
|
| 3 | why do [adv] | 2651 |
|
| 4 | why [vb base] [adv] | 1785 |
|
