No | Pattern | Freq | Relations |
---|---|---|---|
1 | [adv] know for certain | 34 | |
2 | not know for [adj] | 23 | |
3 | [not/n't] know for certain | 20 | |
4 | not know for certain | 20 | |
5 | not [verb] for certain | 15 | |
6 | not know for certain | 12 | |
7 | not know [prep] certain | 12 | |
8 | not know [prep] certain | 12 |