| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [not/n't] know the | 232 |
|
| 2 | [vb past] [not/n't] know at | 27 |
|
| 3 | [not/n't] know at the | 21 |
|
| 4 | [vb past] [not/n't] at the | 11 |
|
