| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] that | 3909 |
|
| 2 | it is [vb pp] that | 3811 |
|
| 3 | it [be] known that | 267 |
|
| 4 | it be known that | 267 |
|
| 5 | it [is] known that | 153 |
|
| 6 | it is know that | 152 |
|
| 7 | it is known [conj] | 151 |
|
| 8 | [pron] is known that | 148 |
|
