| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [vb pp] [pers pn] [verb] | 154 |
|
| 2 | when it [be] [vb pp] [verb] | 44 |
|
| 3 | when it [be] [vb pp] [pers pn] | 43 |
|
