| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] [to-vb] back [prep] | 32 |
|
| 2 | they [vb past] [to-vb] back [prep] | 32 |
|
| 3 | they [vb past] [to-vb] [adv] at | 19 |
|
| 4 | [pron] [vb past] [to-vb] back at | 18 |
|
| 5 | they [vb past] [verb] back at | 10 |
|
| 6 | they [vb past] [to-vb] back at | 5 |
|
| 7 | they [verb] [to-vb] back at | 5 |
|
