| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [verb] be something | 25 |
|
| 2 | it [vb mod] [verb] [been] something | 25 |
|
| 3 | it [vb mod] [verb] been something | 25 |
|
| 4 | it [vb mod] have [be] something | 25 |
|
| 5 | it [vb mod] [vb infin] [be] something | 25 |
|
| 6 | it [vb mod] have [be] something | 23 |
|
| 7 | it must [verb] [be] something | 12 |
|
