| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | work have been [vb pp] out | 40 |
|
| 2 | work have been [vb pp] out | 40 |
|
| 3 | work have been carried out | 36 |
|
| 4 | work has been [vb pp] out | 33 |
|
| 5 | work had been [vb pp] out | 7 |
|
