| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] know [verb] | 11 |
|
| 2 | [modal v] [adv] know [verb] | 10 |
|
| 3 | [modal v] not know [verb] | 7 |
|
| 4 | [modal v] [not/n't] know [verb] | 7 |
|
