| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it [is] [adv] [verb] that | 88 |
|
| 2 | [subord] it [is] [adv] [vb pp] that | 82 |
|
| 3 | [conj] it [is] [adv] known that | 32 |
|
| 4 | [subord] it [is] [adv] known [conj] | 20 |
|
| 5 | [subord] it [be] [adv] known that | 16 |
|
| 6 | [subord] it [is] [adv] know that | 13 |
|
| 7 | [subord] [pron] [is] [adv] known that | 13 |
|
