| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [verb] | 99665 |
|
| 2 | [prep] be [vb pp] | 91259 |
|
| 3 | [prep] be refer | 126 |
|
| 4 | [prep] [be] referred | 116 |
|
