| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been operate | 30 |
|
| 2 | have [been] operate | 30 |
|
| 3 | have be operate | 30 |
|
| 4 | have [be] operating | 23 |
|
| 5 | have [be] operated | 7 |
|
