| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i do [not/n't] know | 12356 |
|
| 2 | i [vb base] n't know | 11845 |
|
| 3 | i [vb base] not know | 500 |
|
| 4 | i [vb base] nt know | 13 |
|
