| 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 |
|
