| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did n't [pers pn] [vb infin] | 596 |
|
| 2 | did n't [pers pn] [vb infin] [pers pn] | 487 |
|
| 3 | why did [pers pn] [vb infin] [pers pn] | 271 |
|
