| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | still do n't know [Wh pn] | 7 |
|
| 2 | still do n't know who | 7 |
|
| 3 | still do n't know [Wh pn] | 7 |
|
| 4 | still do n't know [Wh pn] | 5 |
|
