| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | then [vb past] [prep] | 1677 |
|
| 2 | but [vb past] [prep] | 1629 |
|
| 3 | but then [vb past] | 280 |
|
| 4 | but then [prep] | 112 |
|
