| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [pron] a | 2005 |
|
| 2 | [v-ing] at a | 1472 |
|
| 3 | [v-ing] [pron] at | 913 |
|
| 4 | [pron] at a | 772 |
|
