| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [not/n't] [adv] [verb] that | 57 |
|
| 2 | it is [not/n't] [adv] [vb pp] that | 32 |
|
| 3 | it is [not/n't] [adv] known [conj] | 24 |
|
| 4 | it is [adv] [adv] known that | 17 |
|
| 5 | it [be] [not/n't] [adv] known that | 7 |
|
| 6 | it is [not/n't] [adv] know that | 7 |
|
| 7 | it is [not/n't] [adv] known that | 7 |
|
| 8 | it be [not/n't] [adv] known that | 7 |
|
| 9 | it is [not/n't] [adv] known that | 7 |
|
| 10 | it [is] [not/n't] [adv] known that | 7 |
|
| 11 | it is [not/n't] [adv] known that | 7 |
|
| 12 | it is [not/n't] [adv] known [that] | 7 |
|
| 13 | [pers pn] is [not/n't] [adv] known that | 7 |
|
| 14 | [pron] is [not/n't] [adv] known that | 7 |
|
