| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [verb] [art] | 4995 |
|
| 2 | must [be] [verb] [art] | 270 |
|
| 3 | must be [verb] [art] | 270 |
|
| 4 | must [be] [verb] [art] | 270 |
|
