| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [verb] for | 5399 |
|
| 2 | have [been] operate [prep] | 63 |
|
| 3 | [verb] [been] operate for | 15 |
|
| 4 | have [be] operate for | 15 |
|
