| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] a | 97581 |
|
| 2 | [vb pp] back [prep] | 3389 |
|
| 3 | back [prep] a | 1574 |
|
| 4 | [vb pp] back a | 46 |
|
