| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] [adj] when [art] [noun sg] | 7 |
|
| 2 | back [prep] [num] when [art] [noun sg] | 7 |
|
| 3 | back [prep] [adj] when [art] [noun sg] | 7 |
|
| 4 | back to [adj] when [art] [noun sg] | 6 |
|
