| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] at | 4126 |
|
| 2 | is [vb pp] at | 2600 |
|
| 3 | [verb] is [vb pp] | 1723 |
|
| 4 | [verb] is at | 58 |
|
