| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [vb mod] [be] [art] | 50 |
|
| 2 | [be] [vb pp] [modal v] [be] [art] | 50 |
|
| 3 | [be] [vb pp] must [be] [art] | 6 |
|
| 4 | [be] [vb pp] must [be] [art] | 6 |
|
| 5 | [be] [verb] must [be] [art] | 6 |
|
