| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [be] [verb] | 12232 |
|
| 2 | if it [modal v] [be] | 403 |
|
| 3 | if it [modal v] [verb] | 353 |
|
| 4 | if [modal v] [be] [verb] | 6 |
|
