| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [verb] been operate [prep] | 16 |
|
| 2 | [noun sg] have been operate [prep] | 16 |
|
| 3 | [noun sg] [verb] been operating [prep] | 13 |
|
| 4 | [noun sg] has been operate [prep] | 11 |
|
| 5 | [noun sg] [vb -s] been operate [prep] | 11 |
|
| 6 | [noun sg] [verb] been operate for | 6 |
|
| 7 | [noun sg] [verb] been operate for | 6 |
|
