| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has be operate [prep] | 26 |
|
| 2 | has been operate [prep] | 26 |
|
| 3 | has be operating [prep] | 24 |
|
| 4 | has be operate for | 13 |
|
| 5 | has be operate for | 13 |
|
| 6 | has be operate in | 5 |
|
| 7 | has be operate in | 5 |
|
