| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] should [verb] | 21115 |
|
| 2 | [pron] [modal v] know | 2711 |
|
| 3 | [pron] [vb mod] know | 2711 |
|
| 4 | [pron] should know | 417 |
|
