| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [conj] [v-ing] at [art] | 8 |
|
| 2 | [prep] [subord] [v-ing] at [art] | 6 |
|
| 3 | [prep] [conj] [v-ing] at a | 5 |
|
