| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] did n't they [adv] [vb infin] | 7 |
|
| 2 | why did n't they [adv] [vb infin] | 7 |
|
| 3 | [adv] did n't they [adv] [vb infin] | 7 |
|
| 4 | why did n't they [adv] [vb infin] | 7 |
|
