| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [to-vb] at | 1336 |
|
| 2 | then [vb past] [to-vb] | 740 |
|
| 3 | then [vb past] at | 168 |
|
| 4 | then [to-vb] at | 9 |
|
