| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [modal v] be | 561 |
|
| 2 | [be] [verb] must be | 83 |
|
| 3 | [be] [vb pp] must [be] | 73 |
|
| 4 | [be] [vb pp] must be | 73 |
|
| 5 | [be] [vb pp] must [be] | 73 |
|
