| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [v-ing] [prep] a | 94 |
|
| 2 | has [been] [verb] at a | 43 |
|
| 3 | have [been] [v-ing] at a | 42 |
|
| 4 | [verb] [been] [v-ing] at a | 42 |
|
| 5 | has [been] [v-ing] at [art] | 34 |
|
| 6 | has [been] [v-ing] at [art] | 34 |
|
| 7 | [vb -s] [been] [v-ing] at a | 13 |
|
| 8 | has [been] [v-ing] at a | 12 |
|
| 9 | has [be] [v-ing] at a | 12 |
|
