| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] known [adv] [subord] | 15 |
|
| 2 | [verb] known [adv] [subord] [to-vb] | 14 |
|
| 3 | should [verb] [adv] [subord] [to-vb] | 9 |
|
