| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [pron] | 36740 |
|
| 2 | [prep] [pron] at | 3866 |
|
| 3 | [prep] [v-ing] at | 2878 |
|
| 4 | [v-ing] [pron] at | 913 |
|
