| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [adv] [adv] | 12372 |
|
| 2 | [to-vb] [Wh adv] [adv] | 606 |
|
| 3 | [verb] why [adv] | 231 |
|
| 4 | [to-vb] why [adv] | 39 |
|
