| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been operate | 120 |
|
| 2 | have [been] operating | 92 |
|
| 3 | has [been] operate | 46 |
|
| 4 | had [been] operate | 33 |
|
| 5 | have [been] operate | 30 |
|
| 6 | have [been] operated | 28 |
|
| 7 | have [been] operate | 7 |
|
