| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] be [verb] | 493 |
|
| 2 | must be [verb] [prep] [verb] | 149 |
|
| 3 | must be [verb] [prep] be | 71 |
|
| 4 | must [verb] [prep] be [verb] | 13 |
|
