| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [verb] [prep] [be] | 1089 |
|
| 2 | [vb mod] be [verb] [prep] [be] | 1089 |
|
| 3 | must be [verb] [prep] [be] | 76 |
|
| 4 | must [be] [verb] [prep] [be] | 71 |
|
| 5 | must be [verb] [prep] [be] | 71 |
|
