| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not be [vb pp] back [prep] [art] | 13 |
|
| 2 | not be [verb] back [prep] [art] | 13 |
|
| 3 | not be [verb] back [prep] the | 9 |
|
| 4 | not be [verb] back to [art] | 8 |
|
