| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [verb] [to-vb] | 3284 |
|
| 2 | it [be] often [verb] | 437 |
|
| 3 | [be] often [verb] [to-vb] | 265 |
|
| 4 | it often [verb] [to-vb] | 12 |
|
