| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | still do n't know [pron] | 56 |
|
| 2 | [adv] do n't know [Wh pn] | 15 |
|
| 3 | still do [adv] know [Wh pn] | 8 |
|
| 4 | still do not know [Wh pn] | 8 |
|
| 5 | still do [not/n't] know [Wh pn] | 8 |
|
| 6 | still do n't [verb] [Wh pn] | 7 |
|
| 7 | still [verb] n't know [Wh pn] | 7 |
|
