| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why have [adv] they [verb] | 7 |
|
| 2 | why have [adv] they [vb pp] | 7 |
|
| 3 | why have [adv] they get | 5 |
|
| 4 | why have [adv] they got | 5 |
|
