| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pers pn] should [verb] | 2198 |
|
| 2 | why [pers pn] [modal v] [verb] | 627 |
|
| 3 | why [pers pn] [vb mod] [verb] | 627 |
|
| 4 | why [pron] should [verb] | 413 |
|
| 5 | why [pers pn] should [verb] | 381 |
|
