| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [verb] back [prep] [art] | 10 |
|
| 2 | should be [verb] back [prep] the | 9 |
|
| 3 | should be [vb pp] back [prep] [art] | 7 |
|
| 4 | should be [verb] back to [art] | 6 |
|
