| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [coord] [vb infin] [prep] | 83 |
|
| 2 | back [coord] [vb infin] [prep] | 83 |
|
| 3 | [adv] [coord] [vb infin] at | 83 |
|
| 4 | back [coord] [verb] at | 72 |
|
| 5 | back [conj] [vb infin] at | 12 |
|
| 6 | back [coord] [vb infin] at | 12 |
|
