| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [no cls] why do n't [pers pn] [vb infin] | 17 |
|
| 2 | [no cls] why do n't you [vb infin] | 12 |
|
| 3 | [no cls] why do n't [pers pn] [vb infin] | 9 |
|
| 4 | [no cls] why did n't [pers pn] [vb infin] | 6 |
|
