| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [vb infin] [adj] | 3647 |
|
| 2 | it [modal v] [vb infin] [adj] | 3647 |
|
| 3 | [pron] should [vb infin] [adj] | 1767 |
|
| 4 | it should [verb] [adj] | 124 |
|
| 5 | it should [vb infin] [adj] | 124 |
|
