| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why do [not/n't] they do | 9 |
|
| 2 | why do not they do | 9 |
|
| 3 | why do [adv] they do | 9 |
|
| 4 | why do n't they do | 9 |
|
| 5 | why do [adv] they do | 9 |
|
| 6 | why did [adv] they do | 5 |
|
