| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [prep] then | 85 |
|
| 2 | [vb past] by then | 67 |
|
| 3 | [vb past] until then | 18 |
|
| 4 | [vb past] to then | 9 |
|
| 5 | knew [prep] then | 7 |
|
| 6 | [vb past] before then | 5 |
|
