| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [adj] | 3713 |
|
| 2 | [be] [prep] [adj] | 2213 |
|
| 3 | must [be] [prep] | 1101 |
|
| 4 | must [prep] [adj] | 9 |
|
