| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [art] | 2718 |
|
| 2 | [vb pp] to reduce [art] | 207 |
|
| 3 | been [vb pp] to reduce | 44 |
|
| 4 | been to reduce [art] | 6 |
|
