| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [verb] | 4322 |
|
| 2 | why it [verb] | 372 |
|
| 3 | why [vb past] it | 89 |
|
| 4 | why [vb past] [verb] | 8 |
|
