| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is certain is that [prep] | 7 |
|
| 2 | [is] certain is that [prep] | 7 |
|
| 3 | [be] certain is that [prep] | 7 |
|
| 4 | be certain is that [prep] | 7 |
|
