| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [prep] [be] | 19135 |
|
| 2 | must be [verb] [prep] | 5097 |
|
| 3 | must [verb] [prep] [be] | 67 |
|
| 4 | must be [prep] [be] | 9 |
|
