| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] [adv] | 2215 |
|
| 2 | should [vb infin] [adv] | 2208 |
|
| 3 | [vb mod] know [adv] | 271 |
|
| 4 | [modal v] know [adv] | 271 |
|
| 5 | should know [adv] | 94 |
|
| 6 | should know [adv] | 63 |
|
| 7 | should know [adv] | 63 |
|
