| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] at it [prep] | 109 |
|
| 2 | are [v-ing] it [prep] | 92 |
|
| 3 | are [v-ing] at it | 13 |
|
| 4 | are [v-ing] at [prep] | 9 |
|
