| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [art] [adj] | 1600 |
|
| 2 | [vb infin] at [art] [adj] | 705 |
|
| 3 | must [vb infin] at [art] | 93 |
|
| 4 | must [vb infin] at [adj] | 35 |
|
