| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [conj] [verb] | 5416 |
|
| 2 | back [conj] [verb] | 2021 |
|
| 3 | back [prep] [verb] | 409 |
|
| 4 | back [prep] [conj] | 178 |
|
