| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been operated | 28 |
|
| 2 | have [been] operated | 28 |
|
| 3 | have be operated | 28 |
|
| 4 | had [be] operated | 14 |
|
| 5 | have [be] operated | 7 |
|
