| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] do n't know for sure | 21 |
|
| 2 | [pers pn] do n't know for sure | 21 |
|
| 3 | i do n't know for sure | 12 |
|
| 4 | i do n't know for sure | 12 |
|
| 5 | we do n't know for sure | 6 |
|
| 6 | we do n't know for sure | 6 |
|
| 7 | do n't know for sure [conj] | 5 |
|
