| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [prep] [be] a [adj] | 149 |
|
| 2 | [vb mod] [prep] [be] a [adj] | 149 |
|
| 3 | must [prep] [be] [art] [adj] | 7 |
|
| 4 | must [prep] [be] [art] [adj] | 7 |
|
| 5 | must [prep] [be] a [adj] | 7 |
|
| 6 | must [prep] [be] a [adj] | 6 |
|
| 7 | must [prep] [be] a [adj] | 5 |
|
| 8 | must [prep] [be] a [adj] | 5 |
|
