| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [vb infin] be [prep] [prep] | 10 |
|
| 2 | it [modal v] [vb infin] be [prep] [prep] | 10 |
|
| 3 | it must [vb infin] [be] [prep] [prep] | 7 |
|
| 4 | [pers pn] must [vb infin] be [prep] [prep] | 7 |
|
| 5 | it must [vb infin] be [prep] [prep] | 7 |
|
| 6 | it must [vb infin] be [prep] [prep] | 7 |
|
| 7 | [pron] must [vb infin] be [prep] [prep] | 7 |
|
| 8 | it must [verb] be [prep] [prep] | 7 |
|
| 9 | it must [vb infin] be [prep] [prep] | 7 |
|
