| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] [prep] | 5095 |
|
| 2 | [be] [verb] [prep] be | 1700 |
|
| 3 | must [verb] [prep] be | 67 |
|
| 4 | must [be] [prep] be | 9 |
|
