| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] [art] | 21524 |
|
| 2 | have been [v-ing] [prep] [art] | 1987 |
|
| 3 | have been operate [prep] [art] | 18 |
|
| 4 | [verb] been operating [prep] [art] | 16 |
|
| 5 | have be operating [prep] [art] | 16 |
|
| 6 | have [be] operating [prep] [art] | 16 |
|
| 7 | have [been] operating [prep] [art] | 16 |
|
| 8 | have been operating [prep] [art] | 16 |
|
