| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't [pers pn] [vb infin] an | 13 |
|
| 2 | [Wh adv] do n't you [vb infin] an | 9 |
|
| 3 | [Wh adv] do n't [pers pn] [vb infin] an | 8 |
|
| 4 | [Wh adv] did n't [pers pn] [vb infin] an | 5 |
|
