| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [art] | 4046 |
|
| 2 | have been operate [prep] | 63 |
|
| 3 | have operate [prep] [art] | 61 |
|
| 4 | been operate [prep] [art] | 20 |
|
| 5 | have been operate [art] | 8 |
|
