| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has be operating [prep] [adj] | 10 |
|
| 2 | has been operating [prep] [adj] | 10 |
|
| 3 | has [been] operating [prep] [adj] | 10 |
|
| 4 | has [be] operating [prep] [num] | 7 |
|
| 5 | has [be] operating for [adj] | 6 |
|
