| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [pers pn] must | 105 |
|
| 2 | [vb pp] [pers pn] must [vb infin] | 102 |
|
| 3 | be [vb pp] must [vb infin] | 32 |
|
| 4 | be [pers pn] must [vb infin] | 24 |
|
| 5 | be [vb pp] [pers pn] [vb infin] | 18 |
|
