| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [be] [adj] | 589 |
|
| 2 | must [be] [adj] [noun] | 496 |
|
| 3 | it must [be] [noun] | 147 |
|
| 4 | it [be] [adj] [noun] | 29 |
|
