| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [verb] that | 1268 |
|
| 2 | it [is] [adv] [vb pp] that | 1213 |
|
| 3 | it [be] [adv] known that | 189 |
|
| 4 | it [is] [adv] known that | 160 |
|
| 5 | it [is] [adv] known [conj] | 159 |
|
| 6 | it [is] [adv] know that | 157 |
|
| 7 | [pron] [is] [adv] known that | 157 |
|
| 8 | it [is] [adv] known [that] | 157 |
|
| 9 | it [is] [adv] known that | 157 |
|
