| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [vb pp] [prep] a | 3879 |
|
| 2 | [prep] be [vb pp] [prep] [det] | 2603 |
|
| 3 | be [vb pp] [prep] a [det] | 113 |
|
| 4 | [prep] be [vb pp] a [det] | 12 |
|
