| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [verb] as a | 411 |
|
| 2 | has [been] [v-ing] [prep] a | 94 |
|
| 3 | [verb] [been] [v-ing] as a | 28 |
|
| 4 | have [been] [v-ing] as a | 28 |
|
| 5 | has [been] [v-ing] as [art] | 10 |
|
| 6 | [vb -s] [been] [v-ing] as a | 10 |
|
| 7 | has [been] [v-ing] as [art] | 10 |
|
| 8 | has [been] [v-ing] as a | 8 |
|
| 9 | has [be] [v-ing] as a | 7 |
|
