| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | be [v-ing] [prep] | 71140 |
|
| 3 | be [verb] at | 27062 |
|
| 4 | be [v-ing] at | 6347 |
|
| 5 | [be] [v-ing] at | 6347 |
|
