| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] must [be] | 1115 |
|
| 2 | must [be] [prep] | 1101 |
|
| 3 | [adj] [be] [prep] | 168 |
|
| 4 | [adj] must [prep] | 36 |
|
