| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [vb past] [not/n't] [pers pn] [vb infin] | 599 |
|
| 2 | why [vb past] [pers pn] [vb infin] [prep] | 121 |
|
| 3 | [vb past] [not/n't] [pers pn] [vb infin] [prep] | 118 |
|
