| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] be | 3545 |
|
| 2 | must [vb infin] [det] | 1453 |
|
| 3 | [vb infin] be [det] | 696 |
|
| 4 | must be [det] | 448 |
|
