| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did n't they [vb infin] | 43 |
|
| 2 | why did n't they [vb infin] | 43 |
|
| 3 | [Wh adv] did n't they [vb infin] | 43 |
|
| 4 | [adv] did n't they get | 5 |
|
| 5 | [adv] did n't they do | 5 |
|
