| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't we | 228 |
|
| 2 | do n't we [vb infin] | 214 |
|
| 3 | why do we [vb infin] | 167 |
|
| 4 | why do n't [vb infin] | 13 |
|
