| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [prep] [art] | 2090 |
|
| 2 | be [verb] [prep] [art] [det] | 810 |
|
| 3 | must be [verb] [prep] [det] | 417 |
|
| 4 | must [verb] [prep] [art] [det] | 26 |
|
| 5 | must be [prep] [art] [det] | 12 |
|
