| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] it [modal v] [be] | 378 |
|
| 2 | [prep] [pron] must [be] | 165 |
|
| 3 | [prep] [pers pn] must [be] | 74 |
|
| 4 | [prep] it must [be] | 27 |
|
| 5 | [prep] it must [be] | 27 |
|
