| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [det] | 13304 |
|
| 2 | [prep] [v-ing] at | 2878 |
|
| 3 | [v-ing] at [det] | 1424 |
|
| 4 | [prep] at [det] | 258 |
|
