| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [to-vb] | 17247 |
|
| 2 | be [vb pp] at | 6207 |
|
| 3 | [vb pp] [to-vb] at | 1030 |
|
| 4 | be [to-vb] at | 19 |
|
