| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] in an | 38 |
|
| 2 | has [been] [verb] in an | 38 |
|
| 3 | has be [verb] in an | 38 |
|
| 4 | has [be] [vb pp] in an | 36 |
|
