| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] [subord] [pers pn] [verb] [adv] | 8 |
|
| 2 | back [prep] [subord] [pron] [verb] [adv] | 8 |
|
| 3 | back [prep] if [pron] [verb] [adv] | 7 |
|
| 4 | back [prep] [subord] [pron] [vb past] [adv] | 7 |
|
