| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] [vb mod] [pers pn] [adv] have know | 5 |
|
| 2 | [Wh adv] could [pron] [adv] have know | 5 |
|
| 3 | how [vb mod] [pron] [adv] have know | 5 |
|
| 4 | [Wh adv] [vb mod] [pron] [adv] have known | 5 |
|
