| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] been [v-ing] | 907 |
|
| 2 | [verb] been [v-ing] at | 446 |
|
| 3 | they [verb] [v-ing] at | 40 |
|
| 4 | they [verb] been at | 38 |
|
