| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [verb] back [art] [adj] years | 7 |
|
| 2 | [pron] [verb] back [art] [adj] years | 7 |
|
| 3 | [verb] back [prep] [art] [adj] years | 15 |
|
| 4 | [verb] back [prep] [art] [adj] years | 15 |
|
| 5 | [verb] back to [art] [adj] years | 7 |
|
| 6 | [verb] back to [art] [adj] years | 7 |
|
