| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have [adv] been [verb] [prep] | 3362 |
|
| 2 | [noun] have [adv] been operate [prep] | 7 |
|
| 3 | [noun] [verb] [adv] been operate [prep] | 6 |
|
| 4 | [noun] have [adv] be operate [prep] | 6 |
|
| 5 | [noun] have [adv] [be] operate [prep] | 6 |
|
| 6 | [noun] have [adv] [been] operate [prep] | 6 |
|
