| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adv] [vb pp] back to | 12 |
|
| 2 | [adv] [adv] [vb pp] back to | 11 |
|
| 3 | [adv] [adv] [vb pp] back to | 9 |
|
