| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] at a | 124 |
|
| 2 | been [vb pp] at an | 23 |
|
| 3 | been set at a | 6 |
|
| 4 | been educated at a | 6 |
|
| 5 | been made at a | 5 |
|
