| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] a [adj] | 783 |
|
| 2 | [modal v] [vb infin] a [num ord] | 199 |
|
| 3 | must [vb infin] [art] [num ord] | 33 |
|
| 4 | must [verb] a [num ord] | 9 |
|
