| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adv] been operating | 7 |
|
| 2 | [verb] [adv] been operating | 7 |
|
| 3 | [adv] been operating [prep] | 7 |
|
| 4 | [adv] been operating [prep] | 7 |
|
