| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] [v-ing] [prep] [prep] [det] | 23 |
|
| 2 | [am/are] [verb] [prep] at [det] | 13 |
|
| 3 | [be] [v-ing] [prep] at [det] | 11 |
|
| 4 | [am/are] [v-ing] [prep] at [adj] | 7 |
|
