| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [adv] | 2694 |
|
| 2 | [vb pp] back [adv] | 462 |
|
| 3 | back a [adv] | 75 |
|
| 4 | [vb pp] back a | 50 |
|
