| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] not know that | 21 |
|
| 2 | they [vb past] not know that | 20 |
|
| 3 | they did not know that | 20 |
|
| 4 | they [vb past] n't know that | 11 |
|
| 5 | they [vb past] not know that | 10 |
|
