| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't they [vb infin] | 75 |
|
| 2 | do n't they [vb infin] [adv] | 22 |
|
| 3 | why do they [vb infin] [adv] | 15 |
|
| 4 | why do n't they [adv] | 10 |
|
