| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] a | 37052 |
|
| 2 | must [vb infin] [art] | 4793 |
|
| 3 | must [vb infin] [art] | 4793 |
|
| 4 | must [vb infin] a | 1925 |
|
| 5 | must [verb] a | 1657 |
|
