| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] must [verb] | 444 |
|
| 2 | [adv] must [vb infin] | 443 |
|
| 3 | [adv] [modal v] know | 46 |
|
| 4 | [adv] [vb mod] know | 46 |
|
| 5 | [adv] must know | 11 |
|
| 6 | [adv] must know | 11 |
|
| 7 | [adv] must know | 11 |
|
