| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [v-ing] [prep] a [adj] | 25 |
|
| 2 | has [been] [v-ing] [prep] a [adj] | 25 |
|
| 3 | has [been] [v-ing] for a [adj] | 8 |
|
| 4 | has [been] [v-ing] for a [adj] | 8 |
|
