| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why we do n't [verb] | 25 |
|
| 2 | why we do n't [vb infin] | 25 |
|
| 3 | why we do n't [verb] | 25 |
|
| 4 | why we do n't [verb] | 17 |
|
| 5 | why we did n't [verb] | 8 |
|
