| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] n't know [pron] | 1643 |
|
| 2 | n't know [pron] at | 28 |
|
| 3 | [vb past] n't know at | 21 |
|
| 4 | [vb past] n't [pron] at | 9 |
|
