| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] back | 1585 |
|
| 2 | [vb past] [verb] as | 671 |
|
| 3 | [verb] back as | 140 |
|
| 4 | [vb past] back as | 46 |
|
