| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [adv] | 35516 |
|
| 2 | why [vb past] [pron] | 1579 |
|
| 3 | why [vb past] [adv] | 873 |
|
| 4 | why [pron] [adv] | 288 |
|
