| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [v-ing] at | 446 |
|
| 2 | have [been] [v-ing] this | 183 |
|
| 3 | have [been] at this | 11 |
|
| 4 | [been] [v-ing] at this | 8 |
|
