| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] n't know [pers pn] | 656 |
|
| 2 | [vb past] n't know [adv] | 594 |
|
| 3 | [vb past] n't [pers pn] [adv] | 190 |
|
| 4 | n't know [pers pn] [adv] | 114 |
|
