| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [be] [v-ing] at | 461 |
|
| 2 | [vb infin] [be] [v-ing] [prep] | 369 |
|
| 3 | [vb infin] [be] [v-ing] [prep] | 364 |
|
| 4 | [vb infin] [be] [verb] at | 194 |
|
| 5 | [vb infin] [be] [v-ing] at | 15 |
|
