| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] be [prep] an | 16 |
|
| 2 | [vb pp] is [prep] an | 9 |
|
| 3 | [vb pp] be in an | 7 |
|
| 4 | [vb pp] be in an | 7 |
|
