| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [not/n't] he [vb infin] to | 9 |
|
| 2 | why [verb] n't he [vb infin] to | 8 |
|
| 3 | why did [not/n't] he [vb infin] to | 5 |
|
| 4 | why [vb past] [not/n't] he [vb infin] to | 5 |
|
