| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [be] [verb] [prep] [adj] | 18 |
|
| 2 | it must [be] [vb pp] [prep] [adj] | 17 |
|
| 3 | it must [be] [prep] [art] [adj] | 5 |
|
| 4 | it must [be] [prep] [art] [adj] | 5 |
|
| 5 | it must [be] [prep] [adj] [noun] | 9 |
|
| 6 | it must [be] [prep] [adj] [noun sg] | 8 |
|
