| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [modal v] i [vb infin] | 274 |
|
| 2 | [modal v] [not/n't] i [vb infin] | 243 |
|
| 3 | why [modal v] [not/n't] i | 157 |
|
| 4 | why [modal v] [not/n't] [vb infin] | 5 |
|
