| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb mod] [pron] [vb infin] [verb] | 163 |
|
| 2 | [adv] [vb mod] i [vb infin] [verb] | 121 |
|
| 3 | why [vb mod] i [verb] [verb] | 36 |
|
| 4 | why [modal v] i [vb infin] [verb] | 35 |
|
