| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] be [verb] at | 452 |
|
| 2 | be [verb] at an | 100 |
|
| 3 | [adv] [verb] at an | 78 |
|
| 4 | [adv] be [verb] an | 47 |
|
