| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't they [vb infin] | 118 |
|
| 2 | do n't they [adv] [vb infin] | 34 |
|
| 3 | why do n't they [adv] | 17 |
|
| 4 | why do they [adv] [vb infin] | 14 |
|
