| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been at this | 11 |
|
| 2 | have been at this | 11 |
|
| 3 | been [verb] at this | 26 |
|
| 4 | been [vb pp] at this | 18 |
|
| 5 | been [v-ing] at this | 8 |
|
| 6 | been at this [noun sg] | 9 |
|
| 7 | been at this [noun] | 9 |
|
