| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] a | 15865 |
|
| 2 | be at [art] | 5731 |
|
| 3 | be at [art] | 5731 |
|
| 4 | be at a | 1286 |
|
| 5 | [be] at a | 1033 |
|
