| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] they [vb infin] | 43 |
|
| 2 | did [not/n't] they [vb infin] [pers pn] | 39 |
|
| 3 | why did they [vb infin] [pers pn] | 34 |
|
