| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [vb pp] by a | 728 |
|
| 2 | [prep] be [vb pp] by [det] | 422 |
|
| 3 | be [vb pp] by a [det] | 13 |
|
| 4 | [prep] be [vb pp] a [det] | 12 |
|
