| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] [adj] [noun] | 117 |
|
| 2 | must [be] [prep] [adj] [noun] | 117 |
|
| 3 | [modal v] [be] for [adj] [noun] | 102 |
|
| 4 | must [be] for [adj] [noun] | 6 |
|
