| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [verb] | 51078 |
|
| 2 | it [be] [vb pp] | 37805 |
|
| 3 | [pron] [be] understood | 414 |
|
| 4 | it [be] understand | 355 |
|
