| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why did [pron] not [vb infin] | 55 |
|
| 2 | why do they not [vb infin] | 13 |
|
| 3 | why [verb] they not [vb infin] | 13 |
|
| 4 | why did they [adv] [vb infin] | 10 |
|
| 5 | [adv] did they not [vb infin] | 10 |
|
| 6 | why [vb past] they not [vb infin] | 8 |
|
| 7 | why did they not [vb infin] | 8 |
|
| 8 | why did they not [verb] | 8 |
|
| 9 | why did they [not/n't] [vb infin] | 8 |
|
