| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [be] [prep] | 2063 |
|
| 2 | it [vb mod] [be] [prep] | 2063 |
|
| 3 | [pron] must [be] [prep] | 436 |
|
| 4 | [pers pn] must [be] [prep] | 361 |
|
| 5 | it must [be] [prep] | 189 |
|
| 6 | it must [be] [prep] | 189 |
|
