| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do n't know for [adj] | 34 |
|
| 2 | do n't know for [adj] | 33 |
|
| 3 | do [adv] know for certain | 11 |
|
| 4 | do [not/n't] know for certain | 11 |
|
| 5 | do not know for certain | 11 |
|
| 6 | do n't [verb] for certain | 8 |
|
| 7 | [verb] n't know for certain | 7 |
|
| 8 | do n't know for certain | 7 |
|
| 9 | do n't know [prep] certain | 7 |
|
| 10 | do n't know for certain | 7 |
|
| 11 | do n't know [prep] certain | 7 |
|
