| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [vb pp] a | 1179 |
|
| 2 | should [verb] [vb pp] a | 197 |
|
| 3 | it should [verb] [vb pp] | 130 |
|
| 4 | it should [verb] a | 83 |
|
