| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know [Wh det] i | 237 |
|
| 2 | do n't know what i | 236 |
|
| 3 | do n't know [Wh det] i | 195 |
|
| 4 | did n't know [Wh det] i | 38 |
|
