| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] not [verb] | 2475 |
|
| 2 | it [be] not [vb pp] | 1558 |
|
| 3 | it [be] [adv] known | 565 |
|
| 4 | [pron] [be] not known | 227 |
|
| 5 | [pers pn] [be] not known | 209 |
|
| 6 | it [be] [not/n't] known | 195 |
|
| 7 | it [be] not known | 195 |
|
| 8 | it [be] not know | 194 |
|
| 9 | it [be] not known | 189 |
|
