| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [verb] for [adv] | 286 |
|
| 2 | have [been] operate [prep] [adv] | 7 |
|
| 3 | have [been] operate [prep] [adv] | 7 |
|
| 4 | have [been] operate for [adv] | 6 |
|
| 5 | have [been] operate for [adv] | 6 |
|
| 6 | have [be] operate for [adv] | 6 |
|
| 7 | [verb] [been] operate for [adv] | 6 |
|
