| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know [pron] [modal v] [vb infin] | 1833 |
|
| 2 | [verb] [Wh det] [modal v] [vb infin] | 991 |
|
| 3 | know [Wh det] [modal v] [verb] | 175 |
|
