| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back at [adj] [noun sg] [prep] | 10 |
|
| 2 | back at [det] [noun] [prep] | 8 |
|
| 3 | back at [adj] [noun] [prep] | 7 |
|
| 4 | back at [adj] [noun pl] [prep] | 5 |
|
