| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] at | 6347 |
|
| 2 | [be] [v-ing] [indef pn] | 1844 |
|
| 3 | [be] [indef pn] at | 205 |
|
| 4 | [v-ing] [indef pn] at | 111 |
|
