| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] why [adv] | 32 |
|
| 2 | [to-vb] why so | 18 |
|
| 3 | [to-vb] why so | 18 |
|
| 4 | to explain why [adv] | 12 |
|
| 5 | to understand why [adv] | 8 |
|
| 6 | [to-vb] why [not/n't] | 6 |
|
| 7 | [to-vb] why not | 6 |
|
| 8 | [to-vb] why not | 6 |
|
