| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] have [been] [v-ing] at this | 5 |
|
| 2 | [pron] have [been] [v-ing] at this | 5 |
|
| 3 | [pron] have been [v-ing] at this | 5 |
|
