| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] not [verb] | 2061 |
|
| 2 | it [is] not [vb pp] | 1164 |
|
| 3 | it [is] [adv] known | 447 |
|
| 4 | it [be] not known | 195 |
|
| 5 | [pron] [is] not known | 177 |
|
| 6 | it [is] not know | 166 |
|
