| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it was [verb] that [adj] [noun] | 451 |
|
| 2 | it was [vb pp] that [adj] [noun] | 448 |
|
| 3 | it [be] known that [adj] [noun] | 29 |
|
| 4 | it be known that [adj] [noun] | 29 |
|
| 5 | it [was/were] known that [adj] [noun] | 6 |
|
| 6 | it was know that [adj] [noun] | 5 |
|
| 7 | [pron] was known that [adj] [noun] | 5 |
|
| 8 | it was known [conj] [adj] [noun] | 5 |
|
