| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] at [art] | 295 |
|
| 2 | could be [v-ing] [art] | 83 |
|
| 3 | could be [v-ing] at | 17 |
|
| 4 | could be at [art] | 15 |
|
