| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] back [prep] the [adj] | 48 |
|
| 2 | be [vb pp] back [prep] the [adj] | 44 |
|
| 3 | be [verb] back to the [adj] | 22 |
|
| 4 | be [verb] back to the [adj] | 22 |
|
| 5 | be trace back [prep] the [adj] | 10 |
|
| 6 | be traced back [prep] the [adj] | 10 |
|
| 7 | be [verb] back into the [adj] | 7 |
|
| 8 | be [verb] back into the [adj] | 7 |
|
| 9 | be [verb] back by the [adj] | 6 |
|
| 10 | be [verb] back by the [adj] | 6 |
|
