| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [be] [verb] [prep] | 3743 |
|
| 2 | case [modal v] [be] [verb] [prep] | 151 |
|
| 3 | case it [modal v] [be] [verb] | 26 |
|
| 4 | case it [modal v] [be] [prep] | 7 |
|
