| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can be [verb] back [prep] [art] | 52 |
|
| 2 | can be [vb pp] back [prep] [art] | 52 |
|
| 3 | can be [verb] back [prep] the | 42 |
|
| 4 | can be [verb] back to [art] | 40 |
|
| 5 | can be trace back [prep] [art] | 36 |
|
| 6 | can be traced back [prep] [art] | 36 |
|
| 7 | can be [verb] back [prep] a | 10 |
|
