| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must be [verb] [prep] | 866 |
|
| 2 | [ex0] [modal v] be [verb] [prep] | 79 |
|
| 3 | [ex0] [vb mod] be [verb] [prep] | 79 |
|
| 4 | [ex0] must [be] [verb] [prep] | 6 |
|
| 5 | [ex0] must be [verb] [prep] | 6 |
|
