| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [verb] for | 5698 |
|
| 2 | must be [verb] [prep] | 5097 |
|
| 3 | must be [verb] [prep] | 5097 |
|
| 4 | must [be] [verb] for | 340 |
|
| 5 | must be [verb] for | 340 |
|
