| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] known that | 189 |
|
| 2 | it [is] [adv] known that | 157 |
|
| 3 | it is [adv] known that | 147 |
|
| 4 | it [be] well known that | 130 |
|
| 5 | it was [adv] known that | 31 |
|
| 6 | it [was/were] [adv] known that | 31 |
|
| 7 | it [be] now known that | 25 |
|
| 8 | it [be] also known that | 16 |
|
| 9 | it 's [adv] known that | 10 |
|
| 10 | it [be] already known that | 6 |
|
| 11 | it [be] widely known that | 6 |
|
