| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but i [verb] not know | 25 |
|
| 2 | but i do not know | 25 |
|
| 3 | but i do not know | 16 |
|
| 4 | but i [vb base] not know | 16 |
|
| 5 | but i did not know | 9 |
|
| 6 | but i [vb past] not know | 9 |
|
