| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb past] [vb pp] back [prep] | 22 |
|
| 2 | they had [vb pp] back [prep] | 20 |
|
| 3 | they [vb past] [vb pp] back to | 5 |
|
| 4 | they [vb past] [vb pp] back at | 5 |
|
| 5 | they [vb past] [vb pp] back to | 5 |
|
| 6 | they [vb past] [vb pp] back at | 5 |
|
