| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] a | 5419 |
|
| 2 | have been operate [prep] [art] | 18 |
|
| 3 | have been operate [prep] [art] | 18 |
|
| 4 | have been operate [prep] a | 9 |
|
| 5 | [verb] been operate [prep] a | 6 |
|
| 6 | have [been] operate [prep] a | 6 |
|
| 7 | have be operate [prep] a | 6 |
|
| 8 | have [be] operate [prep] a | 6 |
|
