| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [not/n't] [verb] | 909 |
|
| 2 | why [not/n't] [vb infin] | 848 |
|
| 3 | [adv] [not/n't] use | 33 |
|
| 4 | why [not/n't] use | 23 |
|
| 5 | why [adv] use | 23 |
|
| 6 | [Wh adv] [not/n't] use | 23 |
|
| 7 | why [not/n't] use | 23 |
|
