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