| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have know [prep] the [noun] | 5 |
|
| 2 | must have know [prep] [art] [noun] | 5 |
|
| 3 | must have known [prep] [art] [noun] | 5 |
|
| 4 | must have know [prep] the [noun] | 5 |
|
| 5 | must have know [prep] [art] [noun sg] | 5 |
|
