| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it is [verb] that | 128 |
|
| 2 | but it is [vb pp] that | 121 |
|
| 3 | [conj] it is known that | 60 |
|
| 4 | [coord] it is known that | 21 |
|
| 5 | but it be known that | 12 |
|
| 6 | but it [be] known that | 12 |
|
| 7 | but it is known that | 11 |
|
| 8 | but it is known [conj] | 11 |
|
| 9 | but it is know that | 11 |
|
| 10 | but [pron] is known that | 11 |
|
| 11 | but it [is] known that | 11 |
|
