| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [det] | 7728 |
|
| 2 | [be] [v-ing] at | 6347 |
|
| 3 | [v-ing] at [det] | 1424 |
|
| 4 | [be] at [det] | 1192 |
|
