| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] | 55529 |
|
| 2 | have been [v-ing] [prep] | 6060 |
|
| 3 | have been operate [prep] | 63 |
|
| 4 | have be operating [prep] | 50 |
|
| 5 | have [be] operating [prep] | 50 |
|
| 6 | [verb] been operating [prep] | 50 |
|
| 7 | have [been] operating [prep] | 50 |
|
