| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | then [verb] [to-vb] on [art] | 16 |
|
| 2 | then [vb base] [to-vb] on [art] | 7 |
|
| 3 | then [vb past] [to-vb] on [art] | 6 |
|
