| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [not/n't] know what [noun pl] | 14 |
|
| 2 | did [not/n't] know what [noun pl] | 14 |
|
| 3 | [vb past] n't know what [noun pl] | 7 |
|
| 4 | [vb past] not know what [noun pl] | 7 |
|
