| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [is] [adv] [verb] | 274 |
|
| 2 | [prep] what [is] [adv] [vb pp] | 211 |
|
| 3 | [prep] what [be] [adv] known | 50 |
|
| 4 | [prep] [pron] [is] [adv] known | 31 |
|
| 5 | [prep] what [is] [adv] know | 27 |
|
| 6 | [prep] what [is] [adv] known | 27 |
|
