| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] an [adj] | 295 |
|
| 2 | has [been] [v-ing] [adj] | 268 |
|
| 3 | [been] [v-ing] an [adj] | 58 |
|
| 4 | has [been] [v-ing] an | 31 |
|
