| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do n't they [verb] | 75 |
|
| 2 | why do [not/n't] they [verb] | 75 |
|
| 3 | why do [not/n't] they [vb infin] | 75 |
|
| 4 | why do [not/n't] they have | 7 |
|
| 5 | why do [not/n't] they have | 7 |
|
| 6 | why do [not/n't] they go | 5 |
|
| 7 | why do [not/n't] they go | 5 |
|
