| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] known that | 189 |
|
| 2 | it [be] [adv] known that | 189 |
|
| 3 | it [is] [adv] known that | 157 |
|
| 4 | it 's [adv] [verb] that | 62 |
|
| 5 | it 's [adv] [vb pp] that | 44 |
|
| 6 | it 's [adv] known that | 11 |
|
| 7 | [pron] 's [adv] known that | 10 |
|
| 8 | it 's [adv] know that | 10 |
|
| 9 | it 's [adv] known [conj] | 10 |
|
| 10 | [pers pn] 's [adv] known that | 10 |
|
| 11 | it 's [adv] known that | 10 |
|
