| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that they do n't know | 31 |
|
| 2 | that they do n't know | 22 |
|
| 3 | that they [vb base] n't know | 22 |
|
| 4 | that they [vb past] n't know | 9 |
|
| 5 | that they did n't know | 9 |
|
