| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [pers pn] | 1310 |
|
| 2 | [vb past] why [pers pn] | 342 |
|
| 3 | [vb past] did [pers pn] | 108 |
|
| 4 | [vb past] why did | 14 |
|
