| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be back [prep] [art] | 202 |
|
| 2 | [vb mod] be refer [prep] [art] | 89 |
|
| 3 | [vb mod] be refer back [prep] | 9 |
|
| 4 | be refer back [prep] [art] | 7 |
|
