| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] be [vb pp] | 996 |
|
| 2 | [adv] be [vb pp] [adj] | 349 |
|
| 3 | must [adv] be [adj] | 315 |
|
| 4 | must be [vb pp] [adj] | 218 |
|
