| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] have been [verb] | 5496 |
|
| 2 | [conj] have been [v-ing] | 534 |
|
| 3 | [conj] have been operate | 6 |
|
| 4 | [conj] have be operating | 6 |
|
| 5 | [conj] have [be] operating | 6 |
|
| 6 | [conj] [verb] been operating | 6 |
|
| 7 | [conj] have [been] operating | 6 |
|
