| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] be [noun] [noun] | 134 |
|
| 2 | it [modal v] be [noun] [noun] | 134 |
|
| 3 | [pron] must be [noun] [noun] | 71 |
|
| 4 | it must be [noun] [noun] | 25 |
|
| 5 | it must [be] [noun] [noun] | 25 |
|
