| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at [art] | 9210 |
|
| 2 | [vb past] [been] [art] | 5557 |
|
| 3 | [been] at [art] | 446 |
|
| 4 | [vb past] [been] at | 425 |
|
