| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [art] | 4793 |
|
| 2 | [vb infin] for [art] | 4458 |
|
| 3 | must [vb infin] for | 366 |
|
| 4 | must for [art] | 10 |
|
