| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been operating in | 16 |
|
| 2 | have been operating in | 16 |
|
| 3 | [vb base] been operating in | 5 |
|
| 4 | has been operating in | 5 |
|
| 5 | [vb -s] been operating in | 5 |
|
| 6 | have been operating in | 5 |
|
| 7 | been operating in [noun] | 10 |
|
| 8 | been operating in [noun prp] | 9 |
|
| 9 | been operating in [art] | 5 |
|
| 10 | been operating in [adj] | 5 |
|
| 11 | been operating in [art] | 5 |
|
