| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must be [prep] [noun] | 36 |
|
| 2 | it must be [prep] [noun] | 36 |
|
| 3 | it must [be] [prep] [noun] | 36 |
|
| 4 | it must [be] [prep] [noun] | 36 |
|
| 5 | it must [vb infin] [prep] [noun] | 19 |
|
| 6 | it must [verb] [prep] [noun] | 19 |
|
| 7 | it must [prep] [noun] be | 6 |
|
| 8 | it must [prep] [noun] [be] | 6 |
|
| 9 | it must [prep] [noun] be | 6 |
|
| 10 | it must [prep] [noun] [be] | 6 |
|
