| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [Wh adv] so | 20 |
|
| 2 | [to-vb] why so | 18 |
|
| 3 | to explain [Wh adv] so | 6 |
|
| 4 | to understand [Wh adv] so | 6 |
|
