| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [coord] [vb past] at [art] | 86 |
|
| 2 | back [coord] [vb past] [prep] [art] | 52 |
|
| 3 | back [coord] [verb] at [art] | 25 |
|
| 4 | back [conj] [vb past] at [art] | 11 |
|
