| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know [Wh pn] | 408 |
|
| 2 | [verb] n't know who | 405 |
|
| 3 | do n't know [Wh pn] | 312 |
|
| 4 | [vb base] n't know [Wh pn] | 312 |
|
| 5 | did n't know [Wh pn] | 78 |
|
| 6 | [vb past] n't know [Wh pn] | 78 |
|
| 7 | does n't know [Wh pn] | 16 |
|
| 8 | [vb -s] n't know [Wh pn] | 16 |
|
