| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] have been [v-ing] at | 12 |
|
| 2 | [that] have been [v-ing] at | 8 |
|
| 3 | that have been [v-ing] at | 8 |
|
| 4 | that have been [v-ing] at | 8 |
|
| 5 | [conj] had been [v-ing] at | 5 |
|
| 6 | [conj] has been [v-ing] at | 5 |
|
