| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't we | 241 |
|
| 2 | why [vb base] n't we | 232 |
|
| 3 | why do n't we | 228 |
|
| 4 | why did n't we | 12 |
|
| 5 | why [vb past] n't we | 12 |
|
