| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] at [det] | 392 |
|
| 2 | [prep] be [v-ing] [det] | 346 |
|
| 3 | [prep] [v-ing] at [det] | 249 |
|
| 4 | [prep] be [v-ing] at | 220 |
|
| 5 | [prep] be at [det] | 51 |
|
