| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who do [not/n't] know | 245 |
|
| 2 | [Wh pn] do [not/n't] know | 244 |
|
| 3 | [Wh pn] do n't know | 132 |
|
| 4 | [Wh pn] do [not/n't] know | 113 |
|
| 5 | [Wh pn] do not know | 111 |
|
| 6 | [Wh pn] did [not/n't] know | 93 |
|
| 7 | [Wh pn] does [not/n't] know | 39 |
|
