| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [v-ing] at | 446 |
|
| 2 | [vb infin] [been] [v-ing] [prep] | 348 |
|
| 3 | [vb infin] [been] [v-ing] [prep] | 348 |
|
| 4 | [vb infin] [been] [verb] at | 172 |
|
| 5 | [vb infin] [be] [v-ing] at | 15 |
|
| 6 | [vb infin] [been] [v-ing] at | 15 |
|
