| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [not/n't] certain that | 7 |
|
| 2 | it is [not/n't] [adv] certain that | 8 |
|
| 3 | it is [not/n't] [adv] certain that | 8 |
|
| 4 | it is [not/n't] certain that [pron] | 5 |
|
| 5 | it is [not/n't] certain that [pers pn] | 5 |
|
