| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] [be] [vb pp] [prep] | 449 |
|
| 2 | [adv] [be] [vb pp] [prep] be | 384 |
|
| 3 | must [be] [vb pp] [prep] be | 70 |
|
