| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] and can be | 8 |
|
| 2 | must [vb infin] [conj] can be | 8 |
|
| 3 | must [vb infin] and can be | 8 |
|
| 4 | must [vb infin] [coord] can be | 8 |
|
| 5 | must [vb infin] [conj] can be | 8 |
|
| 6 | must exist [conj] can be | 7 |
|
