| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know | 15927 |
|
| 2 | [vb base] n't know | 15905 |
|
| 3 | [vb base] n't knows | 23 |
|
| 4 | have n't know | 14 |
|
| 5 | [vb base] n't known | 14 |
|
