| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | we do n't know that | 16 |
|
| 2 | we [verb] n't know that | 16 |
|
| 3 | we did n't know that | 10 |
|
| 4 | we [vb past] n't know that | 10 |
|
| 5 | we [vb base] n't know that | 6 |
|
| 6 | we do n't know that | 6 |
|
