| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be not clear that | 76 |
|
| 2 | it [is] not clear that | 69 |
|
| 3 | it is not clear that | 65 |
|
| 4 | it was not clear that | 7 |
|
| 5 | it [was/were] not clear that | 7 |
|
