| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [adv] | 366 |
|
| 2 | have been operate [prep] | 63 |
|
| 3 | have been operate [adv] | 14 |
|
| 4 | been operate [prep] [adv] | 8 |
|
| 5 | have operate [prep] [adv] | 6 |
|
