| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] operating [prep] [art] | 16 |
|
| 2 | [verb] [been] operating [prep] [art] | 16 |
|
| 3 | had [been] operating [prep] [art] | 7 |
|
| 4 | [vb past] [been] operating [prep] [art] | 7 |
|
| 5 | [been] operating [prep] [art] [noun] | 9 |
|
| 6 | [been] operating [prep] [art] [adj] | 7 |
|
| 7 | [been] operating [prep] [art] [adj] | 5 |
|
| 8 | [been] operating [prep] [art] [noun sg] | 5 |
|
