| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know [pers pn] [modal v] [vb infin] | 1601 |
|
| 2 | [verb] [pers pn] must [vb infin] | 1187 |
|
| 3 | know [pron] must [vb infin] | 108 |
|
| 4 | know [pers pn] must [verb] | 108 |
|
