| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [prep] [noun] | 144 |
|
| 2 | it [vb mod] [prep] [noun] | 144 |
|
| 3 | [pron] must [prep] [noun] | 46 |
|
| 4 | it must [prep] [noun] | 14 |
|
| 5 | it must [prep] [noun] | 14 |
|
