| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] n't know [pron] | 1643 |
|
| 2 | n't know [pron] [adv] | 212 |
|
| 3 | [vb past] n't [pron] [adv] | 196 |
|
| 4 | [vb past] n't know [adv] | 109 |
|
