| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [art] [noun] | 3014 |
|
| 2 | must [vb infin] [art] [noun] | 3010 |
|
| 3 | [modal v] know [art] [noun] | 207 |
|
| 4 | must know [art] [noun] | 40 |
|
| 5 | must know [art] [noun] | 40 |
|
