| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] know about | 64 |
|
| 2 | who know about | 63 |
|
| 3 | [Wh pn] knew about | 27 |
|
| 4 | [Wh pn] knows about | 24 |
|
| 5 | [Wh pn] know about | 13 |
|
