| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] how did | 16 |
|
| 2 | how [Wh adv] did | 14 |
|
| 3 | why [Wh adv] did | 13 |
|
| 4 | [Wh adv] why did | 11 |
|
