| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] back [prep] the | 13 |
|
| 2 | could be [vb pp] back [prep] [art] | 13 |
|
| 3 | could be [verb] back [prep] [art] | 13 |
|
| 4 | could be [verb] back into [art] | 5 |
|
