| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [vb infin] | 2647 |
|
| 2 | it should [vb infin] | 1630 |
|
| 3 | [verb] should [vb infin] | 323 |
|
| 4 | it [verb] should | 19 |
|
