| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [pers pn] must [vb infin] | 102 |
|
| 2 | be [vb pp] [pers pn] must | 30 |
|
| 3 | be [vb pp] must [vb infin] | 8 |
|
