| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] [verb] at | 7094 |
|
| 2 | [noun prp] [verb] an | 3947 |
|
| 3 | [verb] at an | 1157 |
|
| 4 | [noun prp] at an | 68 |
|
