| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] in operation [prep] [adj] | 27 |
|
| 2 | have [been] in [noun] [prep] some | 26 |
|
| 3 | have [been] in [noun sg] [prep] some | 24 |
|
| 4 | have [been] in operation [prep] [det] | 8 |
|
| 5 | have [been] [prep] operation [prep] some | 5 |
|
| 6 | have [been] in operation [prep] some | 5 |
|
| 7 | have [be] in operation [prep] some | 5 |
|
| 8 | have [been] in operation [prep] some | 5 |
|
| 9 | [verb] [been] in operation [prep] some | 5 |
|
| 10 | have [been] in operation [prep] some | 5 |
|
