| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [vb infin] be | 3860 |
|
| 2 | it [vb mod] [vb infin] [be] | 3860 |
|
| 3 | [pron] [vb mod] [vb infin] is | 1512 |
|
| 4 | it [modal v] [vb infin] is | 68 |
|
| 5 | it [vb mod] [verb] is | 68 |
|
| 6 | it [vb mod] [vb infin] [is] | 68 |
|
