| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been carried out | 457 |
|
| 2 | [vb -s] been carried out | 180 |
|
| 3 | has been carried out | 178 |
|
| 4 | have been carried out | 127 |
|
| 5 | [vb base] been carried out | 127 |
|
| 6 | [vb past] been carried out | 109 |
|
| 7 | had been carried out | 109 |
|
| 8 | [vb infin] been carried out | 23 |
|
| 9 | have been carried out | 23 |
|
| 10 | [to-vb] been carried out | 15 |
|
| 11 | to have been carried out | 15 |
|
