| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know then | 224 |
|
| 2 | knew then | 97 |
|
| 3 | know then | 57 |
|
| 4 | known then | 29 |
|
| 5 | know then | 27 |
|
| 6 | to know then | 7 |
|
