| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why [pron] should [verb] [verb] | 80 |
|
| 2 | why [pers pn] should [verb] [verb] | 65 |
|
| 3 | [adv] they should [verb] [verb] | 33 |
|
| 4 | why they [modal v] [verb] [verb] | 14 |
|
| 5 | why they should [verb] [verb] | 8 |
|
