| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [not/n't] they [vb infin] | 43 |
|
| 2 | [coord] why did they [vb infin] | 13 |
|
| 3 | [coord] why did [not/n't] they | 6 |
|
| 4 | [coord] did [not/n't] they [vb infin] | 6 |
|
