| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [verb] that [subord] | 243 |
|
| 2 | it [be] often [verb] that | 163 |
|
| 3 | it [be] often [verb] [subord] | 14 |
|
| 4 | [be] often [verb] that [subord] | 9 |
|
