| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] [adj] [noun] | 117 |
|
| 2 | [vb mod] [be] [prep] [adj] condition | 16 |
|
| 3 | [modal v] [be] [prep] [adj] condition | 16 |
|
| 4 | must [be] [prep] [adj] condition | 11 |
|
| 5 | must [be] [prep] [adj] condition | 11 |
|
| 6 | must [be] [prep] [adj] condition | 11 |
|
