| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do [not/n't] know who | 458 |
|
| 2 | do n't know [Wh pn] | 408 |
|
| 3 | do [not/n't] know [Wh pn] | 345 |
|
| 4 | did [not/n't] know [Wh pn] | 98 |
|
| 5 | do not know [Wh pn] | 55 |
|
| 6 | does [not/n't] know [Wh pn] | 18 |
|
