| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adj] [verb] a | 33 |
|
| 2 | must [be] [adj] [to-vb] a | 32 |
|
| 3 | must [be] able [verb] a | 11 |
|
| 4 | must [be] prepared [verb] a | 8 |
|
