| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] | 477770 |
|
| 2 | [vb pp] [prep] a | 97579 |
|
| 3 | be [prep] a | 15865 |
|
| 4 | be [vb pp] a | 7885 |
|
