| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't [pers pn] [vb infin] | 1254 |
|
| 2 | do n't [pers pn] [vb infin] [prep] | 286 |
|
| 3 | why do [pers pn] [vb infin] [prep] | 104 |
|
