| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 're [v-ing] [prep] | 8316 |
|
| 2 | be [v-ing] at | 6347 |
|
| 3 | [be] [v-ing] at | 6347 |
|
| 4 | [am/are] [v-ing] at | 1407 |
|
| 5 | 're [verb] at | 593 |
|
