| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] be [prep] [prep] | 12 |
|
| 2 | [modal v] [verb] be [prep] for | 9 |
|
| 3 | [vb mod] [verb] be [prep] for | 9 |
|
| 4 | must [verb] [be] [prep] for | 8 |
|
| 5 | must [verb] be [prep] for | 8 |
|
| 6 | must [verb] be [prep] for | 8 |
|
