| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't [pers pn] [vb infin] | 1930 |
|
| 2 | do n't [pers pn] [vb infin] a | 240 |
|
| 3 | why do [pers pn] [vb infin] a | 67 |
|
