| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been operate [prep] [art] | 18 |
|
| 2 | [verb] been operate [prep] [art] | 18 |
|
| 3 | [verb] been operating [prep] [art] | 16 |
|
| 4 | [verb] been operate [prep] the | 9 |
|
| 5 | [vb past] been operate [prep] [art] | 7 |
|
| 6 | had been operate [prep] [art] | 7 |
|
| 7 | [verb] been operate [prep] a | 6 |
|
| 8 | [verb] been operate in [art] | 5 |
|
| 9 | have been operate [prep] [art] | 5 |
|
| 10 | [verb] been operate in [art] | 5 |
|
| 11 | [vb base] been operate [prep] [art] | 5 |
|
