| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] [det] [prep] | 126 |
|
| 2 | [v-ing] at [det] [prep] | 90 |
|
| 3 | [been] [v-ing] at [det] | 43 |
|
| 4 | [been] [v-ing] at [prep] | 12 |
|
