| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] back [prep] | 3389 |
|
| 2 | [vb pp] back [prep] | 3389 |
|
| 3 | [vb pp] [adv] at | 3338 |
|
| 4 | [vb pp] [adv prt] at | 1801 |
|
| 5 | [verb] back at | 1630 |
|
| 6 | [vb pp] back at | 105 |
|
| 7 | [vb pp] back at | 105 |
|
