| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [v-ing] [art] | 991 |
|
| 2 | to be at [art] | 303 |
|
| 3 | be [v-ing] at [art] | 295 |
|
| 4 | to be [v-ing] at | 211 |
|
| 5 | to [v-ing] at [art] | 38 |
|
