| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] why do n't they [adv] | 5 |
|
| 2 | [adv] why do n't they [adv] | 5 |
|
| 3 | why do n't they [adv] [verb] | 16 |
|
| 4 | why do n't they [adv] [vb infin] | 16 |
|
