| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [adv] | 593 |
|
| 2 | have been [v-ing] at | 90 |
|
| 3 | been [v-ing] [adv] at | 76 |
|
| 4 | have been [adv] at | 8 |
|
